mac80211.h revision a65240c1013222dbf41166c8b2c5ed2720c807c3
1/* 2 * mac80211 <-> driver interface 3 * 4 * Copyright 2002-2005, Devicescape Software, Inc. 5 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> 6 * Copyright 2007-2010 Johannes Berg <johannes@sipsolutions.net> 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License version 2 as 10 * published by the Free Software Foundation. 11 */ 12 13#ifndef MAC80211_H 14#define MAC80211_H 15 16#include <linux/bug.h> 17#include <linux/kernel.h> 18#include <linux/if_ether.h> 19#include <linux/skbuff.h> 20#include <linux/ieee80211.h> 21#include <net/cfg80211.h> 22#include <asm/unaligned.h> 23 24/** 25 * DOC: Introduction 26 * 27 * mac80211 is the Linux stack for 802.11 hardware that implements 28 * only partial functionality in hard- or firmware. This document 29 * defines the interface between mac80211 and low-level hardware 30 * drivers. 31 */ 32 33/** 34 * DOC: Calling mac80211 from interrupts 35 * 36 * Only ieee80211_tx_status_irqsafe() and ieee80211_rx_irqsafe() can be 37 * called in hardware interrupt context. The low-level driver must not call any 38 * other functions in hardware interrupt context. If there is a need for such 39 * call, the low-level driver should first ACK the interrupt and perform the 40 * IEEE 802.11 code call after this, e.g. from a scheduled workqueue or even 41 * tasklet function. 42 * 43 * NOTE: If the driver opts to use the _irqsafe() functions, it may not also 44 * use the non-IRQ-safe functions! 45 */ 46 47/** 48 * DOC: Warning 49 * 50 * If you're reading this document and not the header file itself, it will 51 * be incomplete because not all documentation has been converted yet. 52 */ 53 54/** 55 * DOC: Frame format 56 * 57 * As a general rule, when frames are passed between mac80211 and the driver, 58 * they start with the IEEE 802.11 header and include the same octets that are 59 * sent over the air except for the FCS which should be calculated by the 60 * hardware. 61 * 62 * There are, however, various exceptions to this rule for advanced features: 63 * 64 * The first exception is for hardware encryption and decryption offload 65 * where the IV/ICV may or may not be generated in hardware. 66 * 67 * Secondly, when the hardware handles fragmentation, the frame handed to 68 * the driver from mac80211 is the MSDU, not the MPDU. 69 * 70 * Finally, for received frames, the driver is able to indicate that it has 71 * filled a radiotap header and put that in front of the frame; if it does 72 * not do so then mac80211 may add this under certain circumstances. 73 */ 74 75/** 76 * DOC: mac80211 workqueue 77 * 78 * mac80211 provides its own workqueue for drivers and internal mac80211 use. 79 * The workqueue is a single threaded workqueue and can only be accessed by 80 * helpers for sanity checking. Drivers must ensure all work added onto the 81 * mac80211 workqueue should be cancelled on the driver stop() callback. 82 * 83 * mac80211 will flushed the workqueue upon interface removal and during 84 * suspend. 85 * 86 * All work performed on the mac80211 workqueue must not acquire the RTNL lock. 87 * 88 */ 89 90struct device; 91 92/** 93 * enum ieee80211_max_queues - maximum number of queues 94 * 95 * @IEEE80211_MAX_QUEUES: Maximum number of regular device queues. 96 */ 97enum ieee80211_max_queues { 98 IEEE80211_MAX_QUEUES = 16, 99}; 100 101#define IEEE80211_INVAL_HW_QUEUE 0xff 102 103/** 104 * enum ieee80211_ac_numbers - AC numbers as used in mac80211 105 * @IEEE80211_AC_VO: voice 106 * @IEEE80211_AC_VI: video 107 * @IEEE80211_AC_BE: best effort 108 * @IEEE80211_AC_BK: background 109 */ 110enum ieee80211_ac_numbers { 111 IEEE80211_AC_VO = 0, 112 IEEE80211_AC_VI = 1, 113 IEEE80211_AC_BE = 2, 114 IEEE80211_AC_BK = 3, 115}; 116#define IEEE80211_NUM_ACS 4 117 118/** 119 * struct ieee80211_tx_queue_params - transmit queue configuration 120 * 121 * The information provided in this structure is required for QoS 122 * transmit queue configuration. Cf. IEEE 802.11 7.3.2.29. 123 * 124 * @aifs: arbitration interframe space [0..255] 125 * @cw_min: minimum contention window [a value of the form 126 * 2^n-1 in the range 1..32767] 127 * @cw_max: maximum contention window [like @cw_min] 128 * @txop: maximum burst time in units of 32 usecs, 0 meaning disabled 129 * @uapsd: is U-APSD mode enabled for the queue 130 */ 131struct ieee80211_tx_queue_params { 132 u16 txop; 133 u16 cw_min; 134 u16 cw_max; 135 u8 aifs; 136 bool uapsd; 137}; 138 139struct ieee80211_low_level_stats { 140 unsigned int dot11ACKFailureCount; 141 unsigned int dot11RTSFailureCount; 142 unsigned int dot11FCSErrorCount; 143 unsigned int dot11RTSSuccessCount; 144}; 145 146/** 147 * enum ieee80211_chanctx_change - change flag for channel context 148 * @IEEE80211_CHANCTX_CHANGE_WIDTH: The channel width changed 149 * @IEEE80211_CHANCTX_CHANGE_RX_CHAINS: The number of RX chains changed 150 */ 151enum ieee80211_chanctx_change { 152 IEEE80211_CHANCTX_CHANGE_WIDTH = BIT(0), 153 IEEE80211_CHANCTX_CHANGE_RX_CHAINS = BIT(1), 154}; 155 156/** 157 * struct ieee80211_chanctx_conf - channel context that vifs may be tuned to 158 * 159 * This is the driver-visible part. The ieee80211_chanctx 160 * that contains it is visible in mac80211 only. 161 * 162 * @def: the channel definition 163 * @rx_chains_static: The number of RX chains that must always be 164 * active on the channel to receive MIMO transmissions 165 * @rx_chains_dynamic: The number of RX chains that must be enabled 166 * after RTS/CTS handshake to receive SMPS MIMO transmissions; 167 * this will always be >= @rx_chains_static. 168 * @drv_priv: data area for driver use, will always be aligned to 169 * sizeof(void *), size is determined in hw information. 170 */ 171struct ieee80211_chanctx_conf { 172 struct cfg80211_chan_def def; 173 174 u8 rx_chains_static, rx_chains_dynamic; 175 176 u8 drv_priv[0] __aligned(sizeof(void *)); 177}; 178 179/** 180 * enum ieee80211_bss_change - BSS change notification flags 181 * 182 * These flags are used with the bss_info_changed() callback 183 * to indicate which BSS parameter changed. 184 * 185 * @BSS_CHANGED_ASSOC: association status changed (associated/disassociated), 186 * also implies a change in the AID. 187 * @BSS_CHANGED_ERP_CTS_PROT: CTS protection changed 188 * @BSS_CHANGED_ERP_PREAMBLE: preamble changed 189 * @BSS_CHANGED_ERP_SLOT: slot timing changed 190 * @BSS_CHANGED_HT: 802.11n parameters changed 191 * @BSS_CHANGED_BASIC_RATES: Basic rateset changed 192 * @BSS_CHANGED_BEACON_INT: Beacon interval changed 193 * @BSS_CHANGED_BSSID: BSSID changed, for whatever 194 * reason (IBSS and managed mode) 195 * @BSS_CHANGED_BEACON: Beacon data changed, retrieve 196 * new beacon (beaconing modes) 197 * @BSS_CHANGED_BEACON_ENABLED: Beaconing should be 198 * enabled/disabled (beaconing modes) 199 * @BSS_CHANGED_CQM: Connection quality monitor config changed 200 * @BSS_CHANGED_IBSS: IBSS join status changed 201 * @BSS_CHANGED_ARP_FILTER: Hardware ARP filter address list or state changed. 202 * @BSS_CHANGED_QOS: QoS for this association was enabled/disabled. Note 203 * that it is only ever disabled for station mode. 204 * @BSS_CHANGED_IDLE: Idle changed for this BSS/interface. 205 * @BSS_CHANGED_SSID: SSID changed for this BSS (AP mode) 206 * @BSS_CHANGED_AP_PROBE_RESP: Probe Response changed for this BSS (AP mode) 207 * @BSS_CHANGED_PS: PS changed for this BSS (STA mode) 208 * @BSS_CHANGED_TXPOWER: TX power setting changed for this interface 209 * @BSS_CHANGED_P2P_PS: P2P powersave settings (CTWindow, opportunistic PS) 210 * changed (currently only in P2P client mode, GO mode will be later) 211 */ 212enum ieee80211_bss_change { 213 BSS_CHANGED_ASSOC = 1<<0, 214 BSS_CHANGED_ERP_CTS_PROT = 1<<1, 215 BSS_CHANGED_ERP_PREAMBLE = 1<<2, 216 BSS_CHANGED_ERP_SLOT = 1<<3, 217 BSS_CHANGED_HT = 1<<4, 218 BSS_CHANGED_BASIC_RATES = 1<<5, 219 BSS_CHANGED_BEACON_INT = 1<<6, 220 BSS_CHANGED_BSSID = 1<<7, 221 BSS_CHANGED_BEACON = 1<<8, 222 BSS_CHANGED_BEACON_ENABLED = 1<<9, 223 BSS_CHANGED_CQM = 1<<10, 224 BSS_CHANGED_IBSS = 1<<11, 225 BSS_CHANGED_ARP_FILTER = 1<<12, 226 BSS_CHANGED_QOS = 1<<13, 227 BSS_CHANGED_IDLE = 1<<14, 228 BSS_CHANGED_SSID = 1<<15, 229 BSS_CHANGED_AP_PROBE_RESP = 1<<16, 230 BSS_CHANGED_PS = 1<<17, 231 BSS_CHANGED_TXPOWER = 1<<18, 232 BSS_CHANGED_P2P_PS = 1<<19, 233 234 /* when adding here, make sure to change ieee80211_reconfig */ 235}; 236 237/* 238 * The maximum number of IPv4 addresses listed for ARP filtering. If the number 239 * of addresses for an interface increase beyond this value, hardware ARP 240 * filtering will be disabled. 241 */ 242#define IEEE80211_BSS_ARP_ADDR_LIST_LEN 4 243 244/** 245 * enum ieee80211_rssi_event - RSSI threshold event 246 * An indicator for when RSSI goes below/above a certain threshold. 247 * @RSSI_EVENT_HIGH: AP's rssi crossed the high threshold set by the driver. 248 * @RSSI_EVENT_LOW: AP's rssi crossed the low threshold set by the driver. 249 */ 250enum ieee80211_rssi_event { 251 RSSI_EVENT_HIGH, 252 RSSI_EVENT_LOW, 253}; 254 255/** 256 * struct ieee80211_bss_conf - holds the BSS's changing parameters 257 * 258 * This structure keeps information about a BSS (and an association 259 * to that BSS) that can change during the lifetime of the BSS. 260 * 261 * @assoc: association status 262 * @ibss_joined: indicates whether this station is part of an IBSS 263 * or not 264 * @ibss_creator: indicates if a new IBSS network is being created 265 * @aid: association ID number, valid only when @assoc is true 266 * @use_cts_prot: use CTS protection 267 * @use_short_preamble: use 802.11b short preamble; 268 * if the hardware cannot handle this it must set the 269 * IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE hardware flag 270 * @use_short_slot: use short slot time (only relevant for ERP); 271 * if the hardware cannot handle this it must set the 272 * IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE hardware flag 273 * @dtim_period: num of beacons before the next DTIM, for beaconing, 274 * valid in station mode only while @assoc is true and if also 275 * requested by %IEEE80211_HW_NEED_DTIM_PERIOD (cf. also hw conf 276 * @ps_dtim_period) 277 * @sync_tsf: last beacon's/probe response's TSF timestamp (could be old 278 * as it may have been received during scanning long ago) 279 * @sync_device_ts: the device timestamp corresponding to the sync_tsf, 280 * the driver/device can use this to calculate synchronisation 281 * @beacon_int: beacon interval 282 * @assoc_capability: capabilities taken from assoc resp 283 * @basic_rates: bitmap of basic rates, each bit stands for an 284 * index into the rate table configured by the driver in 285 * the current band. 286 * @mcast_rate: per-band multicast rate index + 1 (0: disabled) 287 * @bssid: The BSSID for this BSS 288 * @enable_beacon: whether beaconing should be enabled or not 289 * @chandef: Channel definition for this BSS -- the hardware might be 290 * configured a higher bandwidth than this BSS uses, for example. 291 * @ht_operation_mode: HT operation mode like in &struct ieee80211_ht_operation. 292 * This field is only valid when the channel type is one of the HT types. 293 * @cqm_rssi_thold: Connection quality monitor RSSI threshold, a zero value 294 * implies disabled 295 * @cqm_rssi_hyst: Connection quality monitor RSSI hysteresis 296 * @arp_addr_list: List of IPv4 addresses for hardware ARP filtering. The 297 * may filter ARP queries targeted for other addresses than listed here. 298 * The driver must allow ARP queries targeted for all address listed here 299 * to pass through. An empty list implies no ARP queries need to pass. 300 * @arp_addr_cnt: Number of addresses currently on the list. Note that this 301 * may be larger than %IEEE80211_BSS_ARP_ADDR_LIST_LEN (the arp_addr_list 302 * array size), it's up to the driver what to do in that case. 303 * @qos: This is a QoS-enabled BSS. 304 * @idle: This interface is idle. There's also a global idle flag in the 305 * hardware config which may be more appropriate depending on what 306 * your driver/device needs to do. 307 * @ps: power-save mode (STA only). This flag is NOT affected by 308 * offchannel/dynamic_ps operations. 309 * @ssid: The SSID of the current vif. Only valid in AP-mode. 310 * @ssid_len: Length of SSID given in @ssid. 311 * @hidden_ssid: The SSID of the current vif is hidden. Only valid in AP-mode. 312 * @txpower: TX power in dBm 313 * @p2p_ctwindow: P2P CTWindow, only for P2P client interfaces 314 * @p2p_oppps: P2P opportunistic PS is enabled 315 */ 316struct ieee80211_bss_conf { 317 const u8 *bssid; 318 /* association related data */ 319 bool assoc, ibss_joined; 320 bool ibss_creator; 321 u16 aid; 322 /* erp related data */ 323 bool use_cts_prot; 324 bool use_short_preamble; 325 bool use_short_slot; 326 bool enable_beacon; 327 u8 dtim_period; 328 u16 beacon_int; 329 u16 assoc_capability; 330 u64 sync_tsf; 331 u32 sync_device_ts; 332 u32 basic_rates; 333 int mcast_rate[IEEE80211_NUM_BANDS]; 334 u16 ht_operation_mode; 335 s32 cqm_rssi_thold; 336 u32 cqm_rssi_hyst; 337 struct cfg80211_chan_def chandef; 338 __be32 arp_addr_list[IEEE80211_BSS_ARP_ADDR_LIST_LEN]; 339 int arp_addr_cnt; 340 bool qos; 341 bool idle; 342 bool ps; 343 u8 ssid[IEEE80211_MAX_SSID_LEN]; 344 size_t ssid_len; 345 bool hidden_ssid; 346 int txpower; 347 u8 p2p_ctwindow; 348 bool p2p_oppps; 349}; 350 351/** 352 * enum mac80211_tx_control_flags - flags to describe transmission information/status 353 * 354 * These flags are used with the @flags member of &ieee80211_tx_info. 355 * 356 * @IEEE80211_TX_CTL_REQ_TX_STATUS: require TX status callback for this frame. 357 * @IEEE80211_TX_CTL_ASSIGN_SEQ: The driver has to assign a sequence 358 * number to this frame, taking care of not overwriting the fragment 359 * number and increasing the sequence number only when the 360 * IEEE80211_TX_CTL_FIRST_FRAGMENT flag is set. mac80211 will properly 361 * assign sequence numbers to QoS-data frames but cannot do so correctly 362 * for non-QoS-data and management frames because beacons need them from 363 * that counter as well and mac80211 cannot guarantee proper sequencing. 364 * If this flag is set, the driver should instruct the hardware to 365 * assign a sequence number to the frame or assign one itself. Cf. IEEE 366 * 802.11-2007 7.1.3.4.1 paragraph 3. This flag will always be set for 367 * beacons and always be clear for frames without a sequence number field. 368 * @IEEE80211_TX_CTL_NO_ACK: tell the low level not to wait for an ack 369 * @IEEE80211_TX_CTL_CLEAR_PS_FILT: clear powersave filter for destination 370 * station 371 * @IEEE80211_TX_CTL_FIRST_FRAGMENT: this is a first fragment of the frame 372 * @IEEE80211_TX_CTL_SEND_AFTER_DTIM: send this frame after DTIM beacon 373 * @IEEE80211_TX_CTL_AMPDU: this frame should be sent as part of an A-MPDU 374 * @IEEE80211_TX_CTL_INJECTED: Frame was injected, internal to mac80211. 375 * @IEEE80211_TX_STAT_TX_FILTERED: The frame was not transmitted 376 * because the destination STA was in powersave mode. Note that to 377 * avoid race conditions, the filter must be set by the hardware or 378 * firmware upon receiving a frame that indicates that the station 379 * went to sleep (must be done on device to filter frames already on 380 * the queue) and may only be unset after mac80211 gives the OK for 381 * that by setting the IEEE80211_TX_CTL_CLEAR_PS_FILT (see above), 382 * since only then is it guaranteed that no more frames are in the 383 * hardware queue. 384 * @IEEE80211_TX_STAT_ACK: Frame was acknowledged 385 * @IEEE80211_TX_STAT_AMPDU: The frame was aggregated, so status 386 * is for the whole aggregation. 387 * @IEEE80211_TX_STAT_AMPDU_NO_BACK: no block ack was returned, 388 * so consider using block ack request (BAR). 389 * @IEEE80211_TX_CTL_RATE_CTRL_PROBE: internal to mac80211, can be 390 * set by rate control algorithms to indicate probe rate, will 391 * be cleared for fragmented frames (except on the last fragment) 392 * @IEEE80211_TX_INTFL_NEED_TXPROCESSING: completely internal to mac80211, 393 * used to indicate that a pending frame requires TX processing before 394 * it can be sent out. 395 * @IEEE80211_TX_INTFL_RETRIED: completely internal to mac80211, 396 * used to indicate that a frame was already retried due to PS 397 * @IEEE80211_TX_INTFL_DONT_ENCRYPT: completely internal to mac80211, 398 * used to indicate frame should not be encrypted 399 * @IEEE80211_TX_CTL_NO_PS_BUFFER: This frame is a response to a poll 400 * frame (PS-Poll or uAPSD) or a non-bufferable MMPDU and must 401 * be sent although the station is in powersave mode. 402 * @IEEE80211_TX_CTL_MORE_FRAMES: More frames will be passed to the 403 * transmit function after the current frame, this can be used 404 * by drivers to kick the DMA queue only if unset or when the 405 * queue gets full. 406 * @IEEE80211_TX_INTFL_RETRANSMISSION: This frame is being retransmitted 407 * after TX status because the destination was asleep, it must not 408 * be modified again (no seqno assignment, crypto, etc.) 409 * @IEEE80211_TX_INTFL_NL80211_FRAME_TX: Frame was requested through nl80211 410 * MLME command (internal to mac80211 to figure out whether to send TX 411 * status to user space) 412 * @IEEE80211_TX_CTL_LDPC: tells the driver to use LDPC for this frame 413 * @IEEE80211_TX_CTL_STBC: Enables Space-Time Block Coding (STBC) for this 414 * frame and selects the maximum number of streams that it can use. 415 * @IEEE80211_TX_CTL_TX_OFFCHAN: Marks this packet to be transmitted on 416 * the off-channel channel when a remain-on-channel offload is done 417 * in hardware -- normal packets still flow and are expected to be 418 * handled properly by the device. 419 * @IEEE80211_TX_INTFL_TKIP_MIC_FAILURE: Marks this packet to be used for TKIP 420 * testing. It will be sent out with incorrect Michael MIC key to allow 421 * TKIP countermeasures to be tested. 422 * @IEEE80211_TX_CTL_NO_CCK_RATE: This frame will be sent at non CCK rate. 423 * This flag is actually used for management frame especially for P2P 424 * frames not being sent at CCK rate in 2GHz band. 425 * @IEEE80211_TX_STATUS_EOSP: This packet marks the end of service period, 426 * when its status is reported the service period ends. For frames in 427 * an SP that mac80211 transmits, it is already set; for driver frames 428 * the driver may set this flag. It is also used to do the same for 429 * PS-Poll responses. 430 * @IEEE80211_TX_CTL_USE_MINRATE: This frame will be sent at lowest rate. 431 * This flag is used to send nullfunc frame at minimum rate when 432 * the nullfunc is used for connection monitoring purpose. 433 * @IEEE80211_TX_CTL_DONTFRAG: Don't fragment this packet even if it 434 * would be fragmented by size (this is optional, only used for 435 * monitor injection). 436 * 437 * Note: If you have to add new flags to the enumeration, then don't 438 * forget to update %IEEE80211_TX_TEMPORARY_FLAGS when necessary. 439 */ 440enum mac80211_tx_control_flags { 441 IEEE80211_TX_CTL_REQ_TX_STATUS = BIT(0), 442 IEEE80211_TX_CTL_ASSIGN_SEQ = BIT(1), 443 IEEE80211_TX_CTL_NO_ACK = BIT(2), 444 IEEE80211_TX_CTL_CLEAR_PS_FILT = BIT(3), 445 IEEE80211_TX_CTL_FIRST_FRAGMENT = BIT(4), 446 IEEE80211_TX_CTL_SEND_AFTER_DTIM = BIT(5), 447 IEEE80211_TX_CTL_AMPDU = BIT(6), 448 IEEE80211_TX_CTL_INJECTED = BIT(7), 449 IEEE80211_TX_STAT_TX_FILTERED = BIT(8), 450 IEEE80211_TX_STAT_ACK = BIT(9), 451 IEEE80211_TX_STAT_AMPDU = BIT(10), 452 IEEE80211_TX_STAT_AMPDU_NO_BACK = BIT(11), 453 IEEE80211_TX_CTL_RATE_CTRL_PROBE = BIT(12), 454 IEEE80211_TX_INTFL_NEED_TXPROCESSING = BIT(14), 455 IEEE80211_TX_INTFL_RETRIED = BIT(15), 456 IEEE80211_TX_INTFL_DONT_ENCRYPT = BIT(16), 457 IEEE80211_TX_CTL_NO_PS_BUFFER = BIT(17), 458 IEEE80211_TX_CTL_MORE_FRAMES = BIT(18), 459 IEEE80211_TX_INTFL_RETRANSMISSION = BIT(19), 460 /* hole at 20, use later */ 461 IEEE80211_TX_INTFL_NL80211_FRAME_TX = BIT(21), 462 IEEE80211_TX_CTL_LDPC = BIT(22), 463 IEEE80211_TX_CTL_STBC = BIT(23) | BIT(24), 464 IEEE80211_TX_CTL_TX_OFFCHAN = BIT(25), 465 IEEE80211_TX_INTFL_TKIP_MIC_FAILURE = BIT(26), 466 IEEE80211_TX_CTL_NO_CCK_RATE = BIT(27), 467 IEEE80211_TX_STATUS_EOSP = BIT(28), 468 IEEE80211_TX_CTL_USE_MINRATE = BIT(29), 469 IEEE80211_TX_CTL_DONTFRAG = BIT(30), 470}; 471 472#define IEEE80211_TX_CTL_STBC_SHIFT 23 473 474/* 475 * This definition is used as a mask to clear all temporary flags, which are 476 * set by the tx handlers for each transmission attempt by the mac80211 stack. 477 */ 478#define IEEE80211_TX_TEMPORARY_FLAGS (IEEE80211_TX_CTL_NO_ACK | \ 479 IEEE80211_TX_CTL_CLEAR_PS_FILT | IEEE80211_TX_CTL_FIRST_FRAGMENT | \ 480 IEEE80211_TX_CTL_SEND_AFTER_DTIM | IEEE80211_TX_CTL_AMPDU | \ 481 IEEE80211_TX_STAT_TX_FILTERED | IEEE80211_TX_STAT_ACK | \ 482 IEEE80211_TX_STAT_AMPDU | IEEE80211_TX_STAT_AMPDU_NO_BACK | \ 483 IEEE80211_TX_CTL_RATE_CTRL_PROBE | IEEE80211_TX_CTL_NO_PS_BUFFER | \ 484 IEEE80211_TX_CTL_MORE_FRAMES | IEEE80211_TX_CTL_LDPC | \ 485 IEEE80211_TX_CTL_STBC | IEEE80211_TX_STATUS_EOSP) 486 487/** 488 * enum mac80211_rate_control_flags - per-rate flags set by the 489 * Rate Control algorithm. 490 * 491 * These flags are set by the Rate control algorithm for each rate during tx, 492 * in the @flags member of struct ieee80211_tx_rate. 493 * 494 * @IEEE80211_TX_RC_USE_RTS_CTS: Use RTS/CTS exchange for this rate. 495 * @IEEE80211_TX_RC_USE_CTS_PROTECT: CTS-to-self protection is required. 496 * This is set if the current BSS requires ERP protection. 497 * @IEEE80211_TX_RC_USE_SHORT_PREAMBLE: Use short preamble. 498 * @IEEE80211_TX_RC_MCS: HT rate. 499 * @IEEE80211_TX_RC_VHT_MCS: VHT MCS rate, in this case the idx field is split 500 * into a higher 4 bits (Nss) and lower 4 bits (MCS number) 501 * @IEEE80211_TX_RC_GREEN_FIELD: Indicates whether this rate should be used in 502 * Greenfield mode. 503 * @IEEE80211_TX_RC_40_MHZ_WIDTH: Indicates if the Channel Width should be 40 MHz. 504 * @IEEE80211_TX_RC_80_MHZ_WIDTH: Indicates 80 MHz transmission 505 * @IEEE80211_TX_RC_160_MHZ_WIDTH: Indicates 160 MHz transmission 506 * (80+80 isn't supported yet) 507 * @IEEE80211_TX_RC_DUP_DATA: The frame should be transmitted on both of the 508 * adjacent 20 MHz channels, if the current channel type is 509 * NL80211_CHAN_HT40MINUS or NL80211_CHAN_HT40PLUS. 510 * @IEEE80211_TX_RC_SHORT_GI: Short Guard interval should be used for this rate. 511 */ 512enum mac80211_rate_control_flags { 513 IEEE80211_TX_RC_USE_RTS_CTS = BIT(0), 514 IEEE80211_TX_RC_USE_CTS_PROTECT = BIT(1), 515 IEEE80211_TX_RC_USE_SHORT_PREAMBLE = BIT(2), 516 517 /* rate index is an HT/VHT MCS instead of an index */ 518 IEEE80211_TX_RC_MCS = BIT(3), 519 IEEE80211_TX_RC_GREEN_FIELD = BIT(4), 520 IEEE80211_TX_RC_40_MHZ_WIDTH = BIT(5), 521 IEEE80211_TX_RC_DUP_DATA = BIT(6), 522 IEEE80211_TX_RC_SHORT_GI = BIT(7), 523 IEEE80211_TX_RC_VHT_MCS = BIT(8), 524 IEEE80211_TX_RC_80_MHZ_WIDTH = BIT(9), 525 IEEE80211_TX_RC_160_MHZ_WIDTH = BIT(10), 526}; 527 528 529/* there are 40 bytes if you don't need the rateset to be kept */ 530#define IEEE80211_TX_INFO_DRIVER_DATA_SIZE 40 531 532/* if you do need the rateset, then you have less space */ 533#define IEEE80211_TX_INFO_RATE_DRIVER_DATA_SIZE 24 534 535/* maximum number of rate stages */ 536#define IEEE80211_TX_MAX_RATES 4 537 538/** 539 * struct ieee80211_tx_rate - rate selection/status 540 * 541 * @idx: rate index to attempt to send with 542 * @flags: rate control flags (&enum mac80211_rate_control_flags) 543 * @count: number of tries in this rate before going to the next rate 544 * 545 * A value of -1 for @idx indicates an invalid rate and, if used 546 * in an array of retry rates, that no more rates should be tried. 547 * 548 * When used for transmit status reporting, the driver should 549 * always report the rate along with the flags it used. 550 * 551 * &struct ieee80211_tx_info contains an array of these structs 552 * in the control information, and it will be filled by the rate 553 * control algorithm according to what should be sent. For example, 554 * if this array contains, in the format { <idx>, <count> } the 555 * information 556 * { 3, 2 }, { 2, 2 }, { 1, 4 }, { -1, 0 }, { -1, 0 } 557 * then this means that the frame should be transmitted 558 * up to twice at rate 3, up to twice at rate 2, and up to four 559 * times at rate 1 if it doesn't get acknowledged. Say it gets 560 * acknowledged by the peer after the fifth attempt, the status 561 * information should then contain 562 * { 3, 2 }, { 2, 2 }, { 1, 1 }, { -1, 0 } ... 563 * since it was transmitted twice at rate 3, twice at rate 2 564 * and once at rate 1 after which we received an acknowledgement. 565 */ 566struct ieee80211_tx_rate { 567 s8 idx; 568 u16 count:5, 569 flags:11; 570} __packed; 571 572#define IEEE80211_MAX_TX_RETRY 31 573 574static inline void ieee80211_rate_set_vht(struct ieee80211_tx_rate *rate, 575 u8 mcs, u8 nss) 576{ 577 WARN_ON(mcs & ~0xF); 578 WARN_ON(nss & ~0x7); 579 rate->idx = (nss << 4) | mcs; 580} 581 582static inline u8 583ieee80211_rate_get_vht_mcs(const struct ieee80211_tx_rate *rate) 584{ 585 return rate->idx & 0xF; 586} 587 588static inline u8 589ieee80211_rate_get_vht_nss(const struct ieee80211_tx_rate *rate) 590{ 591 return rate->idx >> 4; 592} 593 594/** 595 * struct ieee80211_tx_info - skb transmit information 596 * 597 * This structure is placed in skb->cb for three uses: 598 * (1) mac80211 TX control - mac80211 tells the driver what to do 599 * (2) driver internal use (if applicable) 600 * (3) TX status information - driver tells mac80211 what happened 601 * 602 * @flags: transmit info flags, defined above 603 * @band: the band to transmit on (use for checking for races) 604 * @hw_queue: HW queue to put the frame on, skb_get_queue_mapping() gives the AC 605 * @ack_frame_id: internal frame ID for TX status, used internally 606 * @control: union for control data 607 * @status: union for status data 608 * @driver_data: array of driver_data pointers 609 * @ampdu_ack_len: number of acked aggregated frames. 610 * relevant only if IEEE80211_TX_STAT_AMPDU was set. 611 * @ampdu_len: number of aggregated frames. 612 * relevant only if IEEE80211_TX_STAT_AMPDU was set. 613 * @ack_signal: signal strength of the ACK frame 614 */ 615struct ieee80211_tx_info { 616 /* common information */ 617 u32 flags; 618 u8 band; 619 620 u8 hw_queue; 621 622 u16 ack_frame_id; 623 624 union { 625 struct { 626 union { 627 /* rate control */ 628 struct { 629 struct ieee80211_tx_rate rates[ 630 IEEE80211_TX_MAX_RATES]; 631 s8 rts_cts_rate_idx; 632 /* 3 bytes free */ 633 }; 634 /* only needed before rate control */ 635 unsigned long jiffies; 636 }; 637 /* NB: vif can be NULL for injected frames */ 638 struct ieee80211_vif *vif; 639 struct ieee80211_key_conf *hw_key; 640 /* 8 bytes free */ 641 } control; 642 struct { 643 struct ieee80211_tx_rate rates[IEEE80211_TX_MAX_RATES]; 644 int ack_signal; 645 u8 ampdu_ack_len; 646 u8 ampdu_len; 647 u8 antenna; 648 /* 21 bytes free */ 649 } status; 650 struct { 651 struct ieee80211_tx_rate driver_rates[ 652 IEEE80211_TX_MAX_RATES]; 653 void *rate_driver_data[ 654 IEEE80211_TX_INFO_RATE_DRIVER_DATA_SIZE / sizeof(void *)]; 655 }; 656 void *driver_data[ 657 IEEE80211_TX_INFO_DRIVER_DATA_SIZE / sizeof(void *)]; 658 }; 659}; 660 661/** 662 * struct ieee80211_sched_scan_ies - scheduled scan IEs 663 * 664 * This structure is used to pass the appropriate IEs to be used in scheduled 665 * scans for all bands. It contains both the IEs passed from the userspace 666 * and the ones generated by mac80211. 667 * 668 * @ie: array with the IEs for each supported band 669 * @len: array with the total length of the IEs for each band 670 */ 671struct ieee80211_sched_scan_ies { 672 u8 *ie[IEEE80211_NUM_BANDS]; 673 size_t len[IEEE80211_NUM_BANDS]; 674}; 675 676static inline struct ieee80211_tx_info *IEEE80211_SKB_CB(struct sk_buff *skb) 677{ 678 return (struct ieee80211_tx_info *)skb->cb; 679} 680 681static inline struct ieee80211_rx_status *IEEE80211_SKB_RXCB(struct sk_buff *skb) 682{ 683 return (struct ieee80211_rx_status *)skb->cb; 684} 685 686/** 687 * ieee80211_tx_info_clear_status - clear TX status 688 * 689 * @info: The &struct ieee80211_tx_info to be cleared. 690 * 691 * When the driver passes an skb back to mac80211, it must report 692 * a number of things in TX status. This function clears everything 693 * in the TX status but the rate control information (it does clear 694 * the count since you need to fill that in anyway). 695 * 696 * NOTE: You can only use this function if you do NOT use 697 * info->driver_data! Use info->rate_driver_data 698 * instead if you need only the less space that allows. 699 */ 700static inline void 701ieee80211_tx_info_clear_status(struct ieee80211_tx_info *info) 702{ 703 int i; 704 705 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, status.rates) != 706 offsetof(struct ieee80211_tx_info, control.rates)); 707 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, status.rates) != 708 offsetof(struct ieee80211_tx_info, driver_rates)); 709 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, status.rates) != 8); 710 /* clear the rate counts */ 711 for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) 712 info->status.rates[i].count = 0; 713 714 BUILD_BUG_ON( 715 offsetof(struct ieee80211_tx_info, status.ack_signal) != 20); 716 memset(&info->status.ampdu_ack_len, 0, 717 sizeof(struct ieee80211_tx_info) - 718 offsetof(struct ieee80211_tx_info, status.ampdu_ack_len)); 719} 720 721 722/** 723 * enum mac80211_rx_flags - receive flags 724 * 725 * These flags are used with the @flag member of &struct ieee80211_rx_status. 726 * @RX_FLAG_MMIC_ERROR: Michael MIC error was reported on this frame. 727 * Use together with %RX_FLAG_MMIC_STRIPPED. 728 * @RX_FLAG_DECRYPTED: This frame was decrypted in hardware. 729 * @RX_FLAG_MMIC_STRIPPED: the Michael MIC is stripped off this frame, 730 * verification has been done by the hardware. 731 * @RX_FLAG_IV_STRIPPED: The IV/ICV are stripped from this frame. 732 * If this flag is set, the stack cannot do any replay detection 733 * hence the driver or hardware will have to do that. 734 * @RX_FLAG_FAILED_FCS_CRC: Set this flag if the FCS check failed on 735 * the frame. 736 * @RX_FLAG_FAILED_PLCP_CRC: Set this flag if the PCLP check failed on 737 * the frame. 738 * @RX_FLAG_MACTIME_START: The timestamp passed in the RX status (@mactime 739 * field) is valid and contains the time the first symbol of the MPDU 740 * was received. This is useful in monitor mode and for proper IBSS 741 * merging. 742 * @RX_FLAG_MACTIME_END: The timestamp passed in the RX status (@mactime 743 * field) is valid and contains the time the last symbol of the MPDU 744 * (including FCS) was received. 745 * @RX_FLAG_SHORTPRE: Short preamble was used for this frame 746 * @RX_FLAG_HT: HT MCS was used and rate_idx is MCS index 747 * @RX_FLAG_VHT: VHT MCS was used and rate_index is MCS index 748 * @RX_FLAG_40MHZ: HT40 (40 MHz) was used 749 * @RX_FLAG_80MHZ: 80 MHz was used 750 * @RX_FLAG_80P80MHZ: 80+80 MHz was used 751 * @RX_FLAG_160MHZ: 160 MHz was used 752 * @RX_FLAG_SHORT_GI: Short guard interval was used 753 * @RX_FLAG_NO_SIGNAL_VAL: The signal strength value is not present. 754 * Valid only for data frames (mainly A-MPDU) 755 * @RX_FLAG_HT_GF: This frame was received in a HT-greenfield transmission, if 756 * the driver fills this value it should add %IEEE80211_RADIOTAP_MCS_HAVE_FMT 757 * to hw.radiotap_mcs_details to advertise that fact 758 * @RX_FLAG_AMPDU_DETAILS: A-MPDU details are known, in particular the reference 759 * number (@ampdu_reference) must be populated and be a distinct number for 760 * each A-MPDU 761 * @RX_FLAG_AMPDU_REPORT_ZEROLEN: driver reports 0-length subframes 762 * @RX_FLAG_AMPDU_IS_ZEROLEN: This is a zero-length subframe, for 763 * monitoring purposes only 764 * @RX_FLAG_AMPDU_LAST_KNOWN: last subframe is known, should be set on all 765 * subframes of a single A-MPDU 766 * @RX_FLAG_AMPDU_IS_LAST: this subframe is the last subframe of the A-MPDU 767 * @RX_FLAG_AMPDU_DELIM_CRC_ERROR: A delimiter CRC error has been detected 768 * on this subframe 769 * @RX_FLAG_AMPDU_DELIM_CRC_KNOWN: The delimiter CRC field is known (the CRC 770 * is stored in the @ampdu_delimiter_crc field) 771 */ 772enum mac80211_rx_flags { 773 RX_FLAG_MMIC_ERROR = BIT(0), 774 RX_FLAG_DECRYPTED = BIT(1), 775 RX_FLAG_MMIC_STRIPPED = BIT(3), 776 RX_FLAG_IV_STRIPPED = BIT(4), 777 RX_FLAG_FAILED_FCS_CRC = BIT(5), 778 RX_FLAG_FAILED_PLCP_CRC = BIT(6), 779 RX_FLAG_MACTIME_START = BIT(7), 780 RX_FLAG_SHORTPRE = BIT(8), 781 RX_FLAG_HT = BIT(9), 782 RX_FLAG_40MHZ = BIT(10), 783 RX_FLAG_SHORT_GI = BIT(11), 784 RX_FLAG_NO_SIGNAL_VAL = BIT(12), 785 RX_FLAG_HT_GF = BIT(13), 786 RX_FLAG_AMPDU_DETAILS = BIT(14), 787 RX_FLAG_AMPDU_REPORT_ZEROLEN = BIT(15), 788 RX_FLAG_AMPDU_IS_ZEROLEN = BIT(16), 789 RX_FLAG_AMPDU_LAST_KNOWN = BIT(17), 790 RX_FLAG_AMPDU_IS_LAST = BIT(18), 791 RX_FLAG_AMPDU_DELIM_CRC_ERROR = BIT(19), 792 RX_FLAG_AMPDU_DELIM_CRC_KNOWN = BIT(20), 793 RX_FLAG_MACTIME_END = BIT(21), 794 RX_FLAG_VHT = BIT(22), 795 RX_FLAG_80MHZ = BIT(23), 796 RX_FLAG_80P80MHZ = BIT(24), 797 RX_FLAG_160MHZ = BIT(25), 798}; 799 800/** 801 * struct ieee80211_rx_status - receive status 802 * 803 * The low-level driver should provide this information (the subset 804 * supported by hardware) to the 802.11 code with each received 805 * frame, in the skb's control buffer (cb). 806 * 807 * @mactime: value in microseconds of the 64-bit Time Synchronization Function 808 * (TSF) timer when the first data symbol (MPDU) arrived at the hardware. 809 * @device_timestamp: arbitrary timestamp for the device, mac80211 doesn't use 810 * it but can store it and pass it back to the driver for synchronisation 811 * @band: the active band when this frame was received 812 * @freq: frequency the radio was tuned to when receiving this frame, in MHz 813 * @signal: signal strength when receiving this frame, either in dBm, in dB or 814 * unspecified depending on the hardware capabilities flags 815 * @IEEE80211_HW_SIGNAL_* 816 * @antenna: antenna used 817 * @rate_idx: index of data rate into band's supported rates or MCS index if 818 * HT or VHT is used (%RX_FLAG_HT/%RX_FLAG_VHT) 819 * @vht_nss: number of streams (VHT only) 820 * @flag: %RX_FLAG_* 821 * @rx_flags: internal RX flags for mac80211 822 * @ampdu_reference: A-MPDU reference number, must be a different value for 823 * each A-MPDU but the same for each subframe within one A-MPDU 824 * @ampdu_delimiter_crc: A-MPDU delimiter CRC 825 * @vendor_radiotap_bitmap: radiotap vendor namespace presence bitmap 826 * @vendor_radiotap_len: radiotap vendor namespace length 827 * @vendor_radiotap_align: radiotap vendor namespace alignment. Note 828 * that the actual data must be at the start of the SKB data 829 * already. 830 * @vendor_radiotap_oui: radiotap vendor namespace OUI 831 * @vendor_radiotap_subns: radiotap vendor sub namespace 832 */ 833struct ieee80211_rx_status { 834 u64 mactime; 835 u32 device_timestamp; 836 u32 ampdu_reference; 837 u32 flag; 838 u32 vendor_radiotap_bitmap; 839 u16 vendor_radiotap_len; 840 u16 freq; 841 u8 rate_idx; 842 u8 vht_nss; 843 u8 rx_flags; 844 u8 band; 845 u8 antenna; 846 s8 signal; 847 u8 ampdu_delimiter_crc; 848 u8 vendor_radiotap_align; 849 u8 vendor_radiotap_oui[3]; 850 u8 vendor_radiotap_subns; 851}; 852 853/** 854 * enum ieee80211_conf_flags - configuration flags 855 * 856 * Flags to define PHY configuration options 857 * 858 * @IEEE80211_CONF_MONITOR: there's a monitor interface present -- use this 859 * to determine for example whether to calculate timestamps for packets 860 * or not, do not use instead of filter flags! 861 * @IEEE80211_CONF_PS: Enable 802.11 power save mode (managed mode only). 862 * This is the power save mode defined by IEEE 802.11-2007 section 11.2, 863 * meaning that the hardware still wakes up for beacons, is able to 864 * transmit frames and receive the possible acknowledgment frames. 865 * Not to be confused with hardware specific wakeup/sleep states, 866 * driver is responsible for that. See the section "Powersave support" 867 * for more. 868 * @IEEE80211_CONF_IDLE: The device is running, but idle; if the flag is set 869 * the driver should be prepared to handle configuration requests but 870 * may turn the device off as much as possible. Typically, this flag will 871 * be set when an interface is set UP but not associated or scanning, but 872 * it can also be unset in that case when monitor interfaces are active. 873 * @IEEE80211_CONF_OFFCHANNEL: The device is currently not on its main 874 * operating channel. 875 */ 876enum ieee80211_conf_flags { 877 IEEE80211_CONF_MONITOR = (1<<0), 878 IEEE80211_CONF_PS = (1<<1), 879 IEEE80211_CONF_IDLE = (1<<2), 880 IEEE80211_CONF_OFFCHANNEL = (1<<3), 881}; 882 883 884/** 885 * enum ieee80211_conf_changed - denotes which configuration changed 886 * 887 * @IEEE80211_CONF_CHANGE_LISTEN_INTERVAL: the listen interval changed 888 * @IEEE80211_CONF_CHANGE_MONITOR: the monitor flag changed 889 * @IEEE80211_CONF_CHANGE_PS: the PS flag or dynamic PS timeout changed 890 * @IEEE80211_CONF_CHANGE_POWER: the TX power changed 891 * @IEEE80211_CONF_CHANGE_CHANNEL: the channel/channel_type changed 892 * @IEEE80211_CONF_CHANGE_RETRY_LIMITS: retry limits changed 893 * @IEEE80211_CONF_CHANGE_IDLE: Idle flag changed 894 * @IEEE80211_CONF_CHANGE_SMPS: Spatial multiplexing powersave mode changed 895 * Note that this is only valid if channel contexts are not used, 896 * otherwise each channel context has the number of chains listed. 897 */ 898enum ieee80211_conf_changed { 899 IEEE80211_CONF_CHANGE_SMPS = BIT(1), 900 IEEE80211_CONF_CHANGE_LISTEN_INTERVAL = BIT(2), 901 IEEE80211_CONF_CHANGE_MONITOR = BIT(3), 902 IEEE80211_CONF_CHANGE_PS = BIT(4), 903 IEEE80211_CONF_CHANGE_POWER = BIT(5), 904 IEEE80211_CONF_CHANGE_CHANNEL = BIT(6), 905 IEEE80211_CONF_CHANGE_RETRY_LIMITS = BIT(7), 906 IEEE80211_CONF_CHANGE_IDLE = BIT(8), 907}; 908 909/** 910 * enum ieee80211_smps_mode - spatial multiplexing power save mode 911 * 912 * @IEEE80211_SMPS_AUTOMATIC: automatic 913 * @IEEE80211_SMPS_OFF: off 914 * @IEEE80211_SMPS_STATIC: static 915 * @IEEE80211_SMPS_DYNAMIC: dynamic 916 * @IEEE80211_SMPS_NUM_MODES: internal, don't use 917 */ 918enum ieee80211_smps_mode { 919 IEEE80211_SMPS_AUTOMATIC, 920 IEEE80211_SMPS_OFF, 921 IEEE80211_SMPS_STATIC, 922 IEEE80211_SMPS_DYNAMIC, 923 924 /* keep last */ 925 IEEE80211_SMPS_NUM_MODES, 926}; 927 928/** 929 * struct ieee80211_conf - configuration of the device 930 * 931 * This struct indicates how the driver shall configure the hardware. 932 * 933 * @flags: configuration flags defined above 934 * 935 * @listen_interval: listen interval in units of beacon interval 936 * @max_sleep_period: the maximum number of beacon intervals to sleep for 937 * before checking the beacon for a TIM bit (managed mode only); this 938 * value will be only achievable between DTIM frames, the hardware 939 * needs to check for the multicast traffic bit in DTIM beacons. 940 * This variable is valid only when the CONF_PS flag is set. 941 * @ps_dtim_period: The DTIM period of the AP we're connected to, for use 942 * in power saving. Power saving will not be enabled until a beacon 943 * has been received and the DTIM period is known. 944 * @dynamic_ps_timeout: The dynamic powersave timeout (in ms), see the 945 * powersave documentation below. This variable is valid only when 946 * the CONF_PS flag is set. 947 * 948 * @power_level: requested transmit power (in dBm), backward compatibility 949 * value only that is set to the minimum of all interfaces 950 * 951 * @channel: the channel to tune to 952 * @channel_type: the channel (HT) type 953 * 954 * @long_frame_max_tx_count: Maximum number of transmissions for a "long" frame 955 * (a frame not RTS protected), called "dot11LongRetryLimit" in 802.11, 956 * but actually means the number of transmissions not the number of retries 957 * @short_frame_max_tx_count: Maximum number of transmissions for a "short" 958 * frame, called "dot11ShortRetryLimit" in 802.11, but actually means the 959 * number of transmissions not the number of retries 960 * 961 * @smps_mode: spatial multiplexing powersave mode; note that 962 * %IEEE80211_SMPS_STATIC is used when the device is not 963 * configured for an HT channel. 964 * Note that this is only valid if channel contexts are not used, 965 * otherwise each channel context has the number of chains listed. 966 */ 967struct ieee80211_conf { 968 u32 flags; 969 int power_level, dynamic_ps_timeout; 970 int max_sleep_period; 971 972 u16 listen_interval; 973 u8 ps_dtim_period; 974 975 u8 long_frame_max_tx_count, short_frame_max_tx_count; 976 977 struct ieee80211_channel *channel; 978 enum nl80211_channel_type channel_type; 979 enum ieee80211_smps_mode smps_mode; 980}; 981 982/** 983 * struct ieee80211_channel_switch - holds the channel switch data 984 * 985 * The information provided in this structure is required for channel switch 986 * operation. 987 * 988 * @timestamp: value in microseconds of the 64-bit Time Synchronization 989 * Function (TSF) timer when the frame containing the channel switch 990 * announcement was received. This is simply the rx.mactime parameter 991 * the driver passed into mac80211. 992 * @block_tx: Indicates whether transmission must be blocked before the 993 * scheduled channel switch, as indicated by the AP. 994 * @channel: the new channel to switch to 995 * @count: the number of TBTT's until the channel switch event 996 */ 997struct ieee80211_channel_switch { 998 u64 timestamp; 999 bool block_tx; 1000 struct ieee80211_channel *channel; 1001 u8 count; 1002}; 1003 1004/** 1005 * enum ieee80211_vif_flags - virtual interface flags 1006 * 1007 * @IEEE80211_VIF_BEACON_FILTER: the device performs beacon filtering 1008 * on this virtual interface to avoid unnecessary CPU wakeups 1009 * @IEEE80211_VIF_SUPPORTS_CQM_RSSI: the device can do connection quality 1010 * monitoring on this virtual interface -- i.e. it can monitor 1011 * connection quality related parameters, such as the RSSI level and 1012 * provide notifications if configured trigger levels are reached. 1013 */ 1014enum ieee80211_vif_flags { 1015 IEEE80211_VIF_BEACON_FILTER = BIT(0), 1016 IEEE80211_VIF_SUPPORTS_CQM_RSSI = BIT(1), 1017}; 1018 1019/** 1020 * struct ieee80211_vif - per-interface data 1021 * 1022 * Data in this structure is continually present for driver 1023 * use during the life of a virtual interface. 1024 * 1025 * @type: type of this virtual interface 1026 * @bss_conf: BSS configuration for this interface, either our own 1027 * or the BSS we're associated to 1028 * @addr: address of this interface 1029 * @p2p: indicates whether this AP or STA interface is a p2p 1030 * interface, i.e. a GO or p2p-sta respectively 1031 * @driver_flags: flags/capabilities the driver has for this interface, 1032 * these need to be set (or cleared) when the interface is added 1033 * or, if supported by the driver, the interface type is changed 1034 * at runtime, mac80211 will never touch this field 1035 * @hw_queue: hardware queue for each AC 1036 * @cab_queue: content-after-beacon (DTIM beacon really) queue, AP mode only 1037 * @chanctx_conf: The channel context this interface is assigned to, or %NULL 1038 * when it is not assigned. This pointer is RCU-protected due to the TX 1039 * path needing to access it; even though the netdev carrier will always 1040 * be off when it is %NULL there can still be races and packets could be 1041 * processed after it switches back to %NULL. 1042 * @drv_priv: data area for driver use, will always be aligned to 1043 * sizeof(void *). 1044 */ 1045struct ieee80211_vif { 1046 enum nl80211_iftype type; 1047 struct ieee80211_bss_conf bss_conf; 1048 u8 addr[ETH_ALEN]; 1049 bool p2p; 1050 1051 u8 cab_queue; 1052 u8 hw_queue[IEEE80211_NUM_ACS]; 1053 1054 struct ieee80211_chanctx_conf __rcu *chanctx_conf; 1055 1056 u32 driver_flags; 1057 1058 /* must be last */ 1059 u8 drv_priv[0] __aligned(sizeof(void *)); 1060}; 1061 1062static inline bool ieee80211_vif_is_mesh(struct ieee80211_vif *vif) 1063{ 1064#ifdef CONFIG_MAC80211_MESH 1065 return vif->type == NL80211_IFTYPE_MESH_POINT; 1066#endif 1067 return false; 1068} 1069 1070/** 1071 * enum ieee80211_key_flags - key flags 1072 * 1073 * These flags are used for communication about keys between the driver 1074 * and mac80211, with the @flags parameter of &struct ieee80211_key_conf. 1075 * 1076 * @IEEE80211_KEY_FLAG_WMM_STA: Set by mac80211, this flag indicates 1077 * that the STA this key will be used with could be using QoS. 1078 * @IEEE80211_KEY_FLAG_GENERATE_IV: This flag should be set by the 1079 * driver to indicate that it requires IV generation for this 1080 * particular key. 1081 * @IEEE80211_KEY_FLAG_GENERATE_MMIC: This flag should be set by 1082 * the driver for a TKIP key if it requires Michael MIC 1083 * generation in software. 1084 * @IEEE80211_KEY_FLAG_PAIRWISE: Set by mac80211, this flag indicates 1085 * that the key is pairwise rather then a shared key. 1086 * @IEEE80211_KEY_FLAG_SW_MGMT_TX: This flag should be set by the driver for a 1087 * CCMP key if it requires CCMP encryption of management frames (MFP) to 1088 * be done in software. 1089 * @IEEE80211_KEY_FLAG_PUT_IV_SPACE: This flag should be set by the driver 1090 * if space should be prepared for the IV, but the IV 1091 * itself should not be generated. Do not set together with 1092 * @IEEE80211_KEY_FLAG_GENERATE_IV on the same key. 1093 * @IEEE80211_KEY_FLAG_RX_MGMT: This key will be used to decrypt received 1094 * management frames. The flag can help drivers that have a hardware 1095 * crypto implementation that doesn't deal with management frames 1096 * properly by allowing them to not upload the keys to hardware and 1097 * fall back to software crypto. Note that this flag deals only with 1098 * RX, if your crypto engine can't deal with TX you can also set the 1099 * %IEEE80211_KEY_FLAG_SW_MGMT_TX flag to encrypt such frames in SW. 1100 */ 1101enum ieee80211_key_flags { 1102 IEEE80211_KEY_FLAG_WMM_STA = 1<<0, 1103 IEEE80211_KEY_FLAG_GENERATE_IV = 1<<1, 1104 IEEE80211_KEY_FLAG_GENERATE_MMIC= 1<<2, 1105 IEEE80211_KEY_FLAG_PAIRWISE = 1<<3, 1106 IEEE80211_KEY_FLAG_SW_MGMT_TX = 1<<4, 1107 IEEE80211_KEY_FLAG_PUT_IV_SPACE = 1<<5, 1108 IEEE80211_KEY_FLAG_RX_MGMT = 1<<6, 1109}; 1110 1111/** 1112 * struct ieee80211_key_conf - key information 1113 * 1114 * This key information is given by mac80211 to the driver by 1115 * the set_key() callback in &struct ieee80211_ops. 1116 * 1117 * @hw_key_idx: To be set by the driver, this is the key index the driver 1118 * wants to be given when a frame is transmitted and needs to be 1119 * encrypted in hardware. 1120 * @cipher: The key's cipher suite selector. 1121 * @flags: key flags, see &enum ieee80211_key_flags. 1122 * @keyidx: the key index (0-3) 1123 * @keylen: key material length 1124 * @key: key material. For ALG_TKIP the key is encoded as a 256-bit (32 byte) 1125 * data block: 1126 * - Temporal Encryption Key (128 bits) 1127 * - Temporal Authenticator Tx MIC Key (64 bits) 1128 * - Temporal Authenticator Rx MIC Key (64 bits) 1129 * @icv_len: The ICV length for this key type 1130 * @iv_len: The IV length for this key type 1131 */ 1132struct ieee80211_key_conf { 1133 u32 cipher; 1134 u8 icv_len; 1135 u8 iv_len; 1136 u8 hw_key_idx; 1137 u8 flags; 1138 s8 keyidx; 1139 u8 keylen; 1140 u8 key[0]; 1141}; 1142 1143/** 1144 * enum set_key_cmd - key command 1145 * 1146 * Used with the set_key() callback in &struct ieee80211_ops, this 1147 * indicates whether a key is being removed or added. 1148 * 1149 * @SET_KEY: a key is set 1150 * @DISABLE_KEY: a key must be disabled 1151 */ 1152enum set_key_cmd { 1153 SET_KEY, DISABLE_KEY, 1154}; 1155 1156/** 1157 * enum ieee80211_sta_state - station state 1158 * 1159 * @IEEE80211_STA_NOTEXIST: station doesn't exist at all, 1160 * this is a special state for add/remove transitions 1161 * @IEEE80211_STA_NONE: station exists without special state 1162 * @IEEE80211_STA_AUTH: station is authenticated 1163 * @IEEE80211_STA_ASSOC: station is associated 1164 * @IEEE80211_STA_AUTHORIZED: station is authorized (802.1X) 1165 */ 1166enum ieee80211_sta_state { 1167 /* NOTE: These need to be ordered correctly! */ 1168 IEEE80211_STA_NOTEXIST, 1169 IEEE80211_STA_NONE, 1170 IEEE80211_STA_AUTH, 1171 IEEE80211_STA_ASSOC, 1172 IEEE80211_STA_AUTHORIZED, 1173}; 1174 1175/** 1176 * struct ieee80211_sta - station table entry 1177 * 1178 * A station table entry represents a station we are possibly 1179 * communicating with. Since stations are RCU-managed in 1180 * mac80211, any ieee80211_sta pointer you get access to must 1181 * either be protected by rcu_read_lock() explicitly or implicitly, 1182 * or you must take good care to not use such a pointer after a 1183 * call to your sta_remove callback that removed it. 1184 * 1185 * @addr: MAC address 1186 * @aid: AID we assigned to the station if we're an AP 1187 * @supp_rates: Bitmap of supported rates (per band) 1188 * @ht_cap: HT capabilities of this STA; restricted to our own TX capabilities 1189 * @vht_cap: VHT capabilities of this STA; Not restricting any capabilities 1190 * of remote STA. Taking as is. 1191 * @wme: indicates whether the STA supports WME. Only valid during AP-mode. 1192 * @drv_priv: data area for driver use, will always be aligned to 1193 * sizeof(void *), size is determined in hw information. 1194 * @uapsd_queues: bitmap of queues configured for uapsd. Only valid 1195 * if wme is supported. 1196 * @max_sp: max Service Period. Only valid if wme is supported. 1197 */ 1198struct ieee80211_sta { 1199 u32 supp_rates[IEEE80211_NUM_BANDS]; 1200 u8 addr[ETH_ALEN]; 1201 u16 aid; 1202 struct ieee80211_sta_ht_cap ht_cap; 1203 struct ieee80211_sta_vht_cap vht_cap; 1204 bool wme; 1205 u8 uapsd_queues; 1206 u8 max_sp; 1207 1208 /* must be last */ 1209 u8 drv_priv[0] __aligned(sizeof(void *)); 1210}; 1211 1212/** 1213 * enum sta_notify_cmd - sta notify command 1214 * 1215 * Used with the sta_notify() callback in &struct ieee80211_ops, this 1216 * indicates if an associated station made a power state transition. 1217 * 1218 * @STA_NOTIFY_SLEEP: a station is now sleeping 1219 * @STA_NOTIFY_AWAKE: a sleeping station woke up 1220 */ 1221enum sta_notify_cmd { 1222 STA_NOTIFY_SLEEP, STA_NOTIFY_AWAKE, 1223}; 1224 1225/** 1226 * struct ieee80211_tx_control - TX control data 1227 * 1228 * @sta: station table entry, this sta pointer may be NULL and 1229 * it is not allowed to copy the pointer, due to RCU. 1230 */ 1231struct ieee80211_tx_control { 1232 struct ieee80211_sta *sta; 1233}; 1234 1235/** 1236 * enum ieee80211_hw_flags - hardware flags 1237 * 1238 * These flags are used to indicate hardware capabilities to 1239 * the stack. Generally, flags here should have their meaning 1240 * done in a way that the simplest hardware doesn't need setting 1241 * any particular flags. There are some exceptions to this rule, 1242 * however, so you are advised to review these flags carefully. 1243 * 1244 * @IEEE80211_HW_HAS_RATE_CONTROL: 1245 * The hardware or firmware includes rate control, and cannot be 1246 * controlled by the stack. As such, no rate control algorithm 1247 * should be instantiated, and the TX rate reported to userspace 1248 * will be taken from the TX status instead of the rate control 1249 * algorithm. 1250 * Note that this requires that the driver implement a number of 1251 * callbacks so it has the correct information, it needs to have 1252 * the @set_rts_threshold callback and must look at the BSS config 1253 * @use_cts_prot for G/N protection, @use_short_slot for slot 1254 * timing in 2.4 GHz and @use_short_preamble for preambles for 1255 * CCK frames. 1256 * 1257 * @IEEE80211_HW_RX_INCLUDES_FCS: 1258 * Indicates that received frames passed to the stack include 1259 * the FCS at the end. 1260 * 1261 * @IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING: 1262 * Some wireless LAN chipsets buffer broadcast/multicast frames 1263 * for power saving stations in the hardware/firmware and others 1264 * rely on the host system for such buffering. This option is used 1265 * to configure the IEEE 802.11 upper layer to buffer broadcast and 1266 * multicast frames when there are power saving stations so that 1267 * the driver can fetch them with ieee80211_get_buffered_bc(). 1268 * 1269 * @IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE: 1270 * Hardware is not capable of short slot operation on the 2.4 GHz band. 1271 * 1272 * @IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE: 1273 * Hardware is not capable of receiving frames with short preamble on 1274 * the 2.4 GHz band. 1275 * 1276 * @IEEE80211_HW_SIGNAL_UNSPEC: 1277 * Hardware can provide signal values but we don't know its units. We 1278 * expect values between 0 and @max_signal. 1279 * If possible please provide dB or dBm instead. 1280 * 1281 * @IEEE80211_HW_SIGNAL_DBM: 1282 * Hardware gives signal values in dBm, decibel difference from 1283 * one milliwatt. This is the preferred method since it is standardized 1284 * between different devices. @max_signal does not need to be set. 1285 * 1286 * @IEEE80211_HW_SPECTRUM_MGMT: 1287 * Hardware supports spectrum management defined in 802.11h 1288 * Measurement, Channel Switch, Quieting, TPC 1289 * 1290 * @IEEE80211_HW_AMPDU_AGGREGATION: 1291 * Hardware supports 11n A-MPDU aggregation. 1292 * 1293 * @IEEE80211_HW_SUPPORTS_PS: 1294 * Hardware has power save support (i.e. can go to sleep). 1295 * 1296 * @IEEE80211_HW_PS_NULLFUNC_STACK: 1297 * Hardware requires nullfunc frame handling in stack, implies 1298 * stack support for dynamic PS. 1299 * 1300 * @IEEE80211_HW_SUPPORTS_DYNAMIC_PS: 1301 * Hardware has support for dynamic PS. 1302 * 1303 * @IEEE80211_HW_MFP_CAPABLE: 1304 * Hardware supports management frame protection (MFP, IEEE 802.11w). 1305 * 1306 * @IEEE80211_HW_SUPPORTS_STATIC_SMPS: 1307 * Hardware supports static spatial multiplexing powersave, 1308 * ie. can turn off all but one chain even on HT connections 1309 * that should be using more chains. 1310 * 1311 * @IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS: 1312 * Hardware supports dynamic spatial multiplexing powersave, 1313 * ie. can turn off all but one chain and then wake the rest 1314 * up as required after, for example, rts/cts handshake. 1315 * 1316 * @IEEE80211_HW_SUPPORTS_UAPSD: 1317 * Hardware supports Unscheduled Automatic Power Save Delivery 1318 * (U-APSD) in managed mode. The mode is configured with 1319 * conf_tx() operation. 1320 * 1321 * @IEEE80211_HW_REPORTS_TX_ACK_STATUS: 1322 * Hardware can provide ack status reports of Tx frames to 1323 * the stack. 1324 * 1325 * @IEEE80211_HW_CONNECTION_MONITOR: 1326 * The hardware performs its own connection monitoring, including 1327 * periodic keep-alives to the AP and probing the AP on beacon loss. 1328 * When this flag is set, signaling beacon-loss will cause an immediate 1329 * change to disassociated state. 1330 * 1331 * @IEEE80211_HW_NEED_DTIM_PERIOD: 1332 * This device needs to know the DTIM period for the BSS before 1333 * associating. 1334 * 1335 * @IEEE80211_HW_SUPPORTS_PER_STA_GTK: The device's crypto engine supports 1336 * per-station GTKs as used by IBSS RSN or during fast transition. If 1337 * the device doesn't support per-station GTKs, but can be asked not 1338 * to decrypt group addressed frames, then IBSS RSN support is still 1339 * possible but software crypto will be used. Advertise the wiphy flag 1340 * only in that case. 1341 * 1342 * @IEEE80211_HW_AP_LINK_PS: When operating in AP mode the device 1343 * autonomously manages the PS status of connected stations. When 1344 * this flag is set mac80211 will not trigger PS mode for connected 1345 * stations based on the PM bit of incoming frames. 1346 * Use ieee80211_start_ps()/ieee8021_end_ps() to manually configure 1347 * the PS mode of connected stations. 1348 * 1349 * @IEEE80211_HW_TX_AMPDU_SETUP_IN_HW: The device handles TX A-MPDU session 1350 * setup strictly in HW. mac80211 should not attempt to do this in 1351 * software. 1352 * 1353 * @IEEE80211_HW_SCAN_WHILE_IDLE: The device can do hw scan while 1354 * being idle (i.e. mac80211 doesn't have to go idle-off during the 1355 * the scan). 1356 * 1357 * @IEEE80211_HW_WANT_MONITOR_VIF: The driver would like to be informed of 1358 * a virtual monitor interface when monitor interfaces are the only 1359 * active interfaces. 1360 * 1361 * @IEEE80211_HW_QUEUE_CONTROL: The driver wants to control per-interface 1362 * queue mapping in order to use different queues (not just one per AC) 1363 * for different virtual interfaces. See the doc section on HW queue 1364 * control for more details. 1365 * 1366 * @IEEE80211_HW_P2P_DEV_ADDR_FOR_INTF: Use the P2P Device address for any 1367 * P2P Interface. This will be honoured even if more than one interface 1368 * is supported. 1369 * 1370 * @IEEE80211_HW_TEARDOWN_AGGR_ON_BAR_FAIL: On this hardware TX BA session 1371 * should be tear down once BAR frame will not be acked. 1372 * 1373 */ 1374enum ieee80211_hw_flags { 1375 IEEE80211_HW_HAS_RATE_CONTROL = 1<<0, 1376 IEEE80211_HW_RX_INCLUDES_FCS = 1<<1, 1377 IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING = 1<<2, 1378 IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE = 1<<3, 1379 IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE = 1<<4, 1380 IEEE80211_HW_SIGNAL_UNSPEC = 1<<5, 1381 IEEE80211_HW_SIGNAL_DBM = 1<<6, 1382 IEEE80211_HW_NEED_DTIM_PERIOD = 1<<7, 1383 IEEE80211_HW_SPECTRUM_MGMT = 1<<8, 1384 IEEE80211_HW_AMPDU_AGGREGATION = 1<<9, 1385 IEEE80211_HW_SUPPORTS_PS = 1<<10, 1386 IEEE80211_HW_PS_NULLFUNC_STACK = 1<<11, 1387 IEEE80211_HW_SUPPORTS_DYNAMIC_PS = 1<<12, 1388 IEEE80211_HW_MFP_CAPABLE = 1<<13, 1389 IEEE80211_HW_WANT_MONITOR_VIF = 1<<14, 1390 IEEE80211_HW_SUPPORTS_STATIC_SMPS = 1<<15, 1391 IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS = 1<<16, 1392 IEEE80211_HW_SUPPORTS_UAPSD = 1<<17, 1393 IEEE80211_HW_REPORTS_TX_ACK_STATUS = 1<<18, 1394 IEEE80211_HW_CONNECTION_MONITOR = 1<<19, 1395 IEEE80211_HW_QUEUE_CONTROL = 1<<20, 1396 IEEE80211_HW_SUPPORTS_PER_STA_GTK = 1<<21, 1397 IEEE80211_HW_AP_LINK_PS = 1<<22, 1398 IEEE80211_HW_TX_AMPDU_SETUP_IN_HW = 1<<23, 1399 IEEE80211_HW_SCAN_WHILE_IDLE = 1<<24, 1400 IEEE80211_HW_P2P_DEV_ADDR_FOR_INTF = 1<<25, 1401 IEEE80211_HW_TEARDOWN_AGGR_ON_BAR_FAIL = 1<<26, 1402}; 1403 1404/** 1405 * struct ieee80211_hw - hardware information and state 1406 * 1407 * This structure contains the configuration and hardware 1408 * information for an 802.11 PHY. 1409 * 1410 * @wiphy: This points to the &struct wiphy allocated for this 1411 * 802.11 PHY. You must fill in the @perm_addr and @dev 1412 * members of this structure using SET_IEEE80211_DEV() 1413 * and SET_IEEE80211_PERM_ADDR(). Additionally, all supported 1414 * bands (with channels, bitrates) are registered here. 1415 * 1416 * @conf: &struct ieee80211_conf, device configuration, don't use. 1417 * 1418 * @priv: pointer to private area that was allocated for driver use 1419 * along with this structure. 1420 * 1421 * @flags: hardware flags, see &enum ieee80211_hw_flags. 1422 * 1423 * @extra_tx_headroom: headroom to reserve in each transmit skb 1424 * for use by the driver (e.g. for transmit headers.) 1425 * 1426 * @channel_change_time: time (in microseconds) it takes to change channels. 1427 * 1428 * @max_signal: Maximum value for signal (rssi) in RX information, used 1429 * only when @IEEE80211_HW_SIGNAL_UNSPEC or @IEEE80211_HW_SIGNAL_DB 1430 * 1431 * @max_listen_interval: max listen interval in units of beacon interval 1432 * that HW supports 1433 * 1434 * @queues: number of available hardware transmit queues for 1435 * data packets. WMM/QoS requires at least four, these 1436 * queues need to have configurable access parameters. 1437 * 1438 * @rate_control_algorithm: rate control algorithm for this hardware. 1439 * If unset (NULL), the default algorithm will be used. Must be 1440 * set before calling ieee80211_register_hw(). 1441 * 1442 * @vif_data_size: size (in bytes) of the drv_priv data area 1443 * within &struct ieee80211_vif. 1444 * @sta_data_size: size (in bytes) of the drv_priv data area 1445 * within &struct ieee80211_sta. 1446 * @chanctx_data_size: size (in bytes) of the drv_priv data area 1447 * within &struct ieee80211_chanctx_conf. 1448 * 1449 * @max_rates: maximum number of alternate rate retry stages the hw 1450 * can handle. 1451 * @max_report_rates: maximum number of alternate rate retry stages 1452 * the hw can report back. 1453 * @max_rate_tries: maximum number of tries for each stage 1454 * 1455 * @napi_weight: weight used for NAPI polling. You must specify an 1456 * appropriate value here if a napi_poll operation is provided 1457 * by your driver. 1458 * 1459 * @max_rx_aggregation_subframes: maximum buffer size (number of 1460 * sub-frames) to be used for A-MPDU block ack receiver 1461 * aggregation. 1462 * This is only relevant if the device has restrictions on the 1463 * number of subframes, if it relies on mac80211 to do reordering 1464 * it shouldn't be set. 1465 * 1466 * @max_tx_aggregation_subframes: maximum number of subframes in an 1467 * aggregate an HT driver will transmit, used by the peer as a 1468 * hint to size its reorder buffer. 1469 * 1470 * @offchannel_tx_hw_queue: HW queue ID to use for offchannel TX 1471 * (if %IEEE80211_HW_QUEUE_CONTROL is set) 1472 * 1473 * @radiotap_mcs_details: lists which MCS information can the HW 1474 * reports, by default it is set to _MCS, _GI and _BW but doesn't 1475 * include _FMT. Use %IEEE80211_RADIOTAP_MCS_HAVE_* values, only 1476 * adding _BW is supported today. 1477 * 1478 * @radiotap_vht_details: lists which VHT MCS information the HW reports, 1479 * the default is _GI | _BANDWIDTH. 1480 * Use the %IEEE80211_RADIOTAP_VHT_KNOWN_* values. 1481 * 1482 * @netdev_features: netdev features to be set in each netdev created 1483 * from this HW. Note only HW checksum features are currently 1484 * compatible with mac80211. Other feature bits will be rejected. 1485 */ 1486struct ieee80211_hw { 1487 struct ieee80211_conf conf; 1488 struct wiphy *wiphy; 1489 const char *rate_control_algorithm; 1490 void *priv; 1491 u32 flags; 1492 unsigned int extra_tx_headroom; 1493 int channel_change_time; 1494 int vif_data_size; 1495 int sta_data_size; 1496 int chanctx_data_size; 1497 int napi_weight; 1498 u16 queues; 1499 u16 max_listen_interval; 1500 s8 max_signal; 1501 u8 max_rates; 1502 u8 max_report_rates; 1503 u8 max_rate_tries; 1504 u8 max_rx_aggregation_subframes; 1505 u8 max_tx_aggregation_subframes; 1506 u8 offchannel_tx_hw_queue; 1507 u8 radiotap_mcs_details; 1508 u16 radiotap_vht_details; 1509 netdev_features_t netdev_features; 1510}; 1511 1512/** 1513 * wiphy_to_ieee80211_hw - return a mac80211 driver hw struct from a wiphy 1514 * 1515 * @wiphy: the &struct wiphy which we want to query 1516 * 1517 * mac80211 drivers can use this to get to their respective 1518 * &struct ieee80211_hw. Drivers wishing to get to their own private 1519 * structure can then access it via hw->priv. Note that mac802111 drivers should 1520 * not use wiphy_priv() to try to get their private driver structure as this 1521 * is already used internally by mac80211. 1522 * 1523 * Return: The mac80211 driver hw struct of @wiphy. 1524 */ 1525struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy); 1526 1527/** 1528 * SET_IEEE80211_DEV - set device for 802.11 hardware 1529 * 1530 * @hw: the &struct ieee80211_hw to set the device for 1531 * @dev: the &struct device of this 802.11 device 1532 */ 1533static inline void SET_IEEE80211_DEV(struct ieee80211_hw *hw, struct device *dev) 1534{ 1535 set_wiphy_dev(hw->wiphy, dev); 1536} 1537 1538/** 1539 * SET_IEEE80211_PERM_ADDR - set the permanent MAC address for 802.11 hardware 1540 * 1541 * @hw: the &struct ieee80211_hw to set the MAC address for 1542 * @addr: the address to set 1543 */ 1544static inline void SET_IEEE80211_PERM_ADDR(struct ieee80211_hw *hw, u8 *addr) 1545{ 1546 memcpy(hw->wiphy->perm_addr, addr, ETH_ALEN); 1547} 1548 1549static inline struct ieee80211_rate * 1550ieee80211_get_tx_rate(const struct ieee80211_hw *hw, 1551 const struct ieee80211_tx_info *c) 1552{ 1553 if (WARN_ON_ONCE(c->control.rates[0].idx < 0)) 1554 return NULL; 1555 return &hw->wiphy->bands[c->band]->bitrates[c->control.rates[0].idx]; 1556} 1557 1558static inline struct ieee80211_rate * 1559ieee80211_get_rts_cts_rate(const struct ieee80211_hw *hw, 1560 const struct ieee80211_tx_info *c) 1561{ 1562 if (c->control.rts_cts_rate_idx < 0) 1563 return NULL; 1564 return &hw->wiphy->bands[c->band]->bitrates[c->control.rts_cts_rate_idx]; 1565} 1566 1567static inline struct ieee80211_rate * 1568ieee80211_get_alt_retry_rate(const struct ieee80211_hw *hw, 1569 const struct ieee80211_tx_info *c, int idx) 1570{ 1571 if (c->control.rates[idx + 1].idx < 0) 1572 return NULL; 1573 return &hw->wiphy->bands[c->band]->bitrates[c->control.rates[idx + 1].idx]; 1574} 1575 1576/** 1577 * ieee80211_free_txskb - free TX skb 1578 * @hw: the hardware 1579 * @skb: the skb 1580 * 1581 * Free a transmit skb. Use this funtion when some failure 1582 * to transmit happened and thus status cannot be reported. 1583 */ 1584void ieee80211_free_txskb(struct ieee80211_hw *hw, struct sk_buff *skb); 1585 1586/** 1587 * DOC: Hardware crypto acceleration 1588 * 1589 * mac80211 is capable of taking advantage of many hardware 1590 * acceleration designs for encryption and decryption operations. 1591 * 1592 * The set_key() callback in the &struct ieee80211_ops for a given 1593 * device is called to enable hardware acceleration of encryption and 1594 * decryption. The callback takes a @sta parameter that will be NULL 1595 * for default keys or keys used for transmission only, or point to 1596 * the station information for the peer for individual keys. 1597 * Multiple transmission keys with the same key index may be used when 1598 * VLANs are configured for an access point. 1599 * 1600 * When transmitting, the TX control data will use the @hw_key_idx 1601 * selected by the driver by modifying the &struct ieee80211_key_conf 1602 * pointed to by the @key parameter to the set_key() function. 1603 * 1604 * The set_key() call for the %SET_KEY command should return 0 if 1605 * the key is now in use, -%EOPNOTSUPP or -%ENOSPC if it couldn't be 1606 * added; if you return 0 then hw_key_idx must be assigned to the 1607 * hardware key index, you are free to use the full u8 range. 1608 * 1609 * When the cmd is %DISABLE_KEY then it must succeed. 1610 * 1611 * Note that it is permissible to not decrypt a frame even if a key 1612 * for it has been uploaded to hardware, the stack will not make any 1613 * decision based on whether a key has been uploaded or not but rather 1614 * based on the receive flags. 1615 * 1616 * The &struct ieee80211_key_conf structure pointed to by the @key 1617 * parameter is guaranteed to be valid until another call to set_key() 1618 * removes it, but it can only be used as a cookie to differentiate 1619 * keys. 1620 * 1621 * In TKIP some HW need to be provided a phase 1 key, for RX decryption 1622 * acceleration (i.e. iwlwifi). Those drivers should provide update_tkip_key 1623 * handler. 1624 * The update_tkip_key() call updates the driver with the new phase 1 key. 1625 * This happens every time the iv16 wraps around (every 65536 packets). The 1626 * set_key() call will happen only once for each key (unless the AP did 1627 * rekeying), it will not include a valid phase 1 key. The valid phase 1 key is 1628 * provided by update_tkip_key only. The trigger that makes mac80211 call this 1629 * handler is software decryption with wrap around of iv16. 1630 * 1631 * The set_default_unicast_key() call updates the default WEP key index 1632 * configured to the hardware for WEP encryption type. This is required 1633 * for devices that support offload of data packets (e.g. ARP responses). 1634 */ 1635 1636/** 1637 * DOC: Powersave support 1638 * 1639 * mac80211 has support for various powersave implementations. 1640 * 1641 * First, it can support hardware that handles all powersaving by itself, 1642 * such hardware should simply set the %IEEE80211_HW_SUPPORTS_PS hardware 1643 * flag. In that case, it will be told about the desired powersave mode 1644 * with the %IEEE80211_CONF_PS flag depending on the association status. 1645 * The hardware must take care of sending nullfunc frames when necessary, 1646 * i.e. when entering and leaving powersave mode. The hardware is required 1647 * to look at the AID in beacons and signal to the AP that it woke up when 1648 * it finds traffic directed to it. 1649 * 1650 * %IEEE80211_CONF_PS flag enabled means that the powersave mode defined in 1651 * IEEE 802.11-2007 section 11.2 is enabled. This is not to be confused 1652 * with hardware wakeup and sleep states. Driver is responsible for waking 1653 * up the hardware before issuing commands to the hardware and putting it 1654 * back to sleep at appropriate times. 1655 * 1656 * When PS is enabled, hardware needs to wakeup for beacons and receive the 1657 * buffered multicast/broadcast frames after the beacon. Also it must be 1658 * possible to send frames and receive the acknowledment frame. 1659 * 1660 * Other hardware designs cannot send nullfunc frames by themselves and also 1661 * need software support for parsing the TIM bitmap. This is also supported 1662 * by mac80211 by combining the %IEEE80211_HW_SUPPORTS_PS and 1663 * %IEEE80211_HW_PS_NULLFUNC_STACK flags. The hardware is of course still 1664 * required to pass up beacons. The hardware is still required to handle 1665 * waking up for multicast traffic; if it cannot the driver must handle that 1666 * as best as it can, mac80211 is too slow to do that. 1667 * 1668 * Dynamic powersave is an extension to normal powersave in which the 1669 * hardware stays awake for a user-specified period of time after sending a 1670 * frame so that reply frames need not be buffered and therefore delayed to 1671 * the next wakeup. It's compromise of getting good enough latency when 1672 * there's data traffic and still saving significantly power in idle 1673 * periods. 1674 * 1675 * Dynamic powersave is simply supported by mac80211 enabling and disabling 1676 * PS based on traffic. Driver needs to only set %IEEE80211_HW_SUPPORTS_PS 1677 * flag and mac80211 will handle everything automatically. Additionally, 1678 * hardware having support for the dynamic PS feature may set the 1679 * %IEEE80211_HW_SUPPORTS_DYNAMIC_PS flag to indicate that it can support 1680 * dynamic PS mode itself. The driver needs to look at the 1681 * @dynamic_ps_timeout hardware configuration value and use it that value 1682 * whenever %IEEE80211_CONF_PS is set. In this case mac80211 will disable 1683 * dynamic PS feature in stack and will just keep %IEEE80211_CONF_PS 1684 * enabled whenever user has enabled powersave. 1685 * 1686 * Some hardware need to toggle a single shared antenna between WLAN and 1687 * Bluetooth to facilitate co-existence. These types of hardware set 1688 * limitations on the use of host controlled dynamic powersave whenever there 1689 * is simultaneous WLAN and Bluetooth traffic. For these types of hardware, the 1690 * driver may request temporarily going into full power save, in order to 1691 * enable toggling the antenna between BT and WLAN. If the driver requests 1692 * disabling dynamic powersave, the @dynamic_ps_timeout value will be 1693 * temporarily set to zero until the driver re-enables dynamic powersave. 1694 * 1695 * Driver informs U-APSD client support by enabling 1696 * %IEEE80211_HW_SUPPORTS_UAPSD flag. The mode is configured through the 1697 * uapsd paramater in conf_tx() operation. Hardware needs to send the QoS 1698 * Nullfunc frames and stay awake until the service period has ended. To 1699 * utilize U-APSD, dynamic powersave is disabled for voip AC and all frames 1700 * from that AC are transmitted with powersave enabled. 1701 * 1702 * Note: U-APSD client mode is not yet supported with 1703 * %IEEE80211_HW_PS_NULLFUNC_STACK. 1704 */ 1705 1706/** 1707 * DOC: Beacon filter support 1708 * 1709 * Some hardware have beacon filter support to reduce host cpu wakeups 1710 * which will reduce system power consumption. It usually works so that 1711 * the firmware creates a checksum of the beacon but omits all constantly 1712 * changing elements (TSF, TIM etc). Whenever the checksum changes the 1713 * beacon is forwarded to the host, otherwise it will be just dropped. That 1714 * way the host will only receive beacons where some relevant information 1715 * (for example ERP protection or WMM settings) have changed. 1716 * 1717 * Beacon filter support is advertised with the %IEEE80211_VIF_BEACON_FILTER 1718 * interface capability. The driver needs to enable beacon filter support 1719 * whenever power save is enabled, that is %IEEE80211_CONF_PS is set. When 1720 * power save is enabled, the stack will not check for beacon loss and the 1721 * driver needs to notify about loss of beacons with ieee80211_beacon_loss(). 1722 * 1723 * The time (or number of beacons missed) until the firmware notifies the 1724 * driver of a beacon loss event (which in turn causes the driver to call 1725 * ieee80211_beacon_loss()) should be configurable and will be controlled 1726 * by mac80211 and the roaming algorithm in the future. 1727 * 1728 * Since there may be constantly changing information elements that nothing 1729 * in the software stack cares about, we will, in the future, have mac80211 1730 * tell the driver which information elements are interesting in the sense 1731 * that we want to see changes in them. This will include 1732 * - a list of information element IDs 1733 * - a list of OUIs for the vendor information element 1734 * 1735 * Ideally, the hardware would filter out any beacons without changes in the 1736 * requested elements, but if it cannot support that it may, at the expense 1737 * of some efficiency, filter out only a subset. For example, if the device 1738 * doesn't support checking for OUIs it should pass up all changes in all 1739 * vendor information elements. 1740 * 1741 * Note that change, for the sake of simplification, also includes information 1742 * elements appearing or disappearing from the beacon. 1743 * 1744 * Some hardware supports an "ignore list" instead, just make sure nothing 1745 * that was requested is on the ignore list, and include commonly changing 1746 * information element IDs in the ignore list, for example 11 (BSS load) and 1747 * the various vendor-assigned IEs with unknown contents (128, 129, 133-136, 1748 * 149, 150, 155, 156, 173, 176, 178, 179, 219); for forward compatibility 1749 * it could also include some currently unused IDs. 1750 * 1751 * 1752 * In addition to these capabilities, hardware should support notifying the 1753 * host of changes in the beacon RSSI. This is relevant to implement roaming 1754 * when no traffic is flowing (when traffic is flowing we see the RSSI of 1755 * the received data packets). This can consist in notifying the host when 1756 * the RSSI changes significantly or when it drops below or rises above 1757 * configurable thresholds. In the future these thresholds will also be 1758 * configured by mac80211 (which gets them from userspace) to implement 1759 * them as the roaming algorithm requires. 1760 * 1761 * If the hardware cannot implement this, the driver should ask it to 1762 * periodically pass beacon frames to the host so that software can do the 1763 * signal strength threshold checking. 1764 */ 1765 1766/** 1767 * DOC: Spatial multiplexing power save 1768 * 1769 * SMPS (Spatial multiplexing power save) is a mechanism to conserve 1770 * power in an 802.11n implementation. For details on the mechanism 1771 * and rationale, please refer to 802.11 (as amended by 802.11n-2009) 1772 * "11.2.3 SM power save". 1773 * 1774 * The mac80211 implementation is capable of sending action frames 1775 * to update the AP about the station's SMPS mode, and will instruct 1776 * the driver to enter the specific mode. It will also announce the 1777 * requested SMPS mode during the association handshake. Hardware 1778 * support for this feature is required, and can be indicated by 1779 * hardware flags. 1780 * 1781 * The default mode will be "automatic", which nl80211/cfg80211 1782 * defines to be dynamic SMPS in (regular) powersave, and SMPS 1783 * turned off otherwise. 1784 * 1785 * To support this feature, the driver must set the appropriate 1786 * hardware support flags, and handle the SMPS flag to the config() 1787 * operation. It will then with this mechanism be instructed to 1788 * enter the requested SMPS mode while associated to an HT AP. 1789 */ 1790 1791/** 1792 * DOC: Frame filtering 1793 * 1794 * mac80211 requires to see many management frames for proper 1795 * operation, and users may want to see many more frames when 1796 * in monitor mode. However, for best CPU usage and power consumption, 1797 * having as few frames as possible percolate through the stack is 1798 * desirable. Hence, the hardware should filter as much as possible. 1799 * 1800 * To achieve this, mac80211 uses filter flags (see below) to tell 1801 * the driver's configure_filter() function which frames should be 1802 * passed to mac80211 and which should be filtered out. 1803 * 1804 * Before configure_filter() is invoked, the prepare_multicast() 1805 * callback is invoked with the parameters @mc_count and @mc_list 1806 * for the combined multicast address list of all virtual interfaces. 1807 * It's use is optional, and it returns a u64 that is passed to 1808 * configure_filter(). Additionally, configure_filter() has the 1809 * arguments @changed_flags telling which flags were changed and 1810 * @total_flags with the new flag states. 1811 * 1812 * If your device has no multicast address filters your driver will 1813 * need to check both the %FIF_ALLMULTI flag and the @mc_count 1814 * parameter to see whether multicast frames should be accepted 1815 * or dropped. 1816 * 1817 * All unsupported flags in @total_flags must be cleared. 1818 * Hardware does not support a flag if it is incapable of _passing_ 1819 * the frame to the stack. Otherwise the driver must ignore 1820 * the flag, but not clear it. 1821 * You must _only_ clear the flag (announce no support for the 1822 * flag to mac80211) if you are not able to pass the packet type 1823 * to the stack (so the hardware always filters it). 1824 * So for example, you should clear @FIF_CONTROL, if your hardware 1825 * always filters control frames. If your hardware always passes 1826 * control frames to the kernel and is incapable of filtering them, 1827 * you do _not_ clear the @FIF_CONTROL flag. 1828 * This rule applies to all other FIF flags as well. 1829 */ 1830 1831/** 1832 * DOC: AP support for powersaving clients 1833 * 1834 * In order to implement AP and P2P GO modes, mac80211 has support for 1835 * client powersaving, both "legacy" PS (PS-Poll/null data) and uAPSD. 1836 * There currently is no support for sAPSD. 1837 * 1838 * There is one assumption that mac80211 makes, namely that a client 1839 * will not poll with PS-Poll and trigger with uAPSD at the same time. 1840 * Both are supported, and both can be used by the same client, but 1841 * they can't be used concurrently by the same client. This simplifies 1842 * the driver code. 1843 * 1844 * The first thing to keep in mind is that there is a flag for complete 1845 * driver implementation: %IEEE80211_HW_AP_LINK_PS. If this flag is set, 1846 * mac80211 expects the driver to handle most of the state machine for 1847 * powersaving clients and will ignore the PM bit in incoming frames. 1848 * Drivers then use ieee80211_sta_ps_transition() to inform mac80211 of 1849 * stations' powersave transitions. In this mode, mac80211 also doesn't 1850 * handle PS-Poll/uAPSD. 1851 * 1852 * In the mode without %IEEE80211_HW_AP_LINK_PS, mac80211 will check the 1853 * PM bit in incoming frames for client powersave transitions. When a 1854 * station goes to sleep, we will stop transmitting to it. There is, 1855 * however, a race condition: a station might go to sleep while there is 1856 * data buffered on hardware queues. If the device has support for this 1857 * it will reject frames, and the driver should give the frames back to 1858 * mac80211 with the %IEEE80211_TX_STAT_TX_FILTERED flag set which will 1859 * cause mac80211 to retry the frame when the station wakes up. The 1860 * driver is also notified of powersave transitions by calling its 1861 * @sta_notify callback. 1862 * 1863 * When the station is asleep, it has three choices: it can wake up, 1864 * it can PS-Poll, or it can possibly start a uAPSD service period. 1865 * Waking up is implemented by simply transmitting all buffered (and 1866 * filtered) frames to the station. This is the easiest case. When 1867 * the station sends a PS-Poll or a uAPSD trigger frame, mac80211 1868 * will inform the driver of this with the @allow_buffered_frames 1869 * callback; this callback is optional. mac80211 will then transmit 1870 * the frames as usual and set the %IEEE80211_TX_CTL_NO_PS_BUFFER 1871 * on each frame. The last frame in the service period (or the only 1872 * response to a PS-Poll) also has %IEEE80211_TX_STATUS_EOSP set to 1873 * indicate that it ends the service period; as this frame must have 1874 * TX status report it also sets %IEEE80211_TX_CTL_REQ_TX_STATUS. 1875 * When TX status is reported for this frame, the service period is 1876 * marked has having ended and a new one can be started by the peer. 1877 * 1878 * Additionally, non-bufferable MMPDUs can also be transmitted by 1879 * mac80211 with the %IEEE80211_TX_CTL_NO_PS_BUFFER set in them. 1880 * 1881 * Another race condition can happen on some devices like iwlwifi 1882 * when there are frames queued for the station and it wakes up 1883 * or polls; the frames that are already queued could end up being 1884 * transmitted first instead, causing reordering and/or wrong 1885 * processing of the EOSP. The cause is that allowing frames to be 1886 * transmitted to a certain station is out-of-band communication to 1887 * the device. To allow this problem to be solved, the driver can 1888 * call ieee80211_sta_block_awake() if frames are buffered when it 1889 * is notified that the station went to sleep. When all these frames 1890 * have been filtered (see above), it must call the function again 1891 * to indicate that the station is no longer blocked. 1892 * 1893 * If the driver buffers frames in the driver for aggregation in any 1894 * way, it must use the ieee80211_sta_set_buffered() call when it is 1895 * notified of the station going to sleep to inform mac80211 of any 1896 * TIDs that have frames buffered. Note that when a station wakes up 1897 * this information is reset (hence the requirement to call it when 1898 * informed of the station going to sleep). Then, when a service 1899 * period starts for any reason, @release_buffered_frames is called 1900 * with the number of frames to be released and which TIDs they are 1901 * to come from. In this case, the driver is responsible for setting 1902 * the EOSP (for uAPSD) and MORE_DATA bits in the released frames, 1903 * to help the @more_data paramter is passed to tell the driver if 1904 * there is more data on other TIDs -- the TIDs to release frames 1905 * from are ignored since mac80211 doesn't know how many frames the 1906 * buffers for those TIDs contain. 1907 * 1908 * If the driver also implement GO mode, where absence periods may 1909 * shorten service periods (or abort PS-Poll responses), it must 1910 * filter those response frames except in the case of frames that 1911 * are buffered in the driver -- those must remain buffered to avoid 1912 * reordering. Because it is possible that no frames are released 1913 * in this case, the driver must call ieee80211_sta_eosp_irqsafe() 1914 * to indicate to mac80211 that the service period ended anyway. 1915 * 1916 * Finally, if frames from multiple TIDs are released from mac80211 1917 * but the driver might reorder them, it must clear & set the flags 1918 * appropriately (only the last frame may have %IEEE80211_TX_STATUS_EOSP) 1919 * and also take care of the EOSP and MORE_DATA bits in the frame. 1920 * The driver may also use ieee80211_sta_eosp_irqsafe() in this case. 1921 */ 1922 1923/** 1924 * DOC: HW queue control 1925 * 1926 * Before HW queue control was introduced, mac80211 only had a single static 1927 * assignment of per-interface AC software queues to hardware queues. This 1928 * was problematic for a few reasons: 1929 * 1) off-channel transmissions might get stuck behind other frames 1930 * 2) multiple virtual interfaces couldn't be handled correctly 1931 * 3) after-DTIM frames could get stuck behind other frames 1932 * 1933 * To solve this, hardware typically uses multiple different queues for all 1934 * the different usages, and this needs to be propagated into mac80211 so it 1935 * won't have the same problem with the software queues. 1936 * 1937 * Therefore, mac80211 now offers the %IEEE80211_HW_QUEUE_CONTROL capability 1938 * flag that tells it that the driver implements its own queue control. To do 1939 * so, the driver will set up the various queues in each &struct ieee80211_vif 1940 * and the offchannel queue in &struct ieee80211_hw. In response, mac80211 will 1941 * use those queue IDs in the hw_queue field of &struct ieee80211_tx_info and 1942 * if necessary will queue the frame on the right software queue that mirrors 1943 * the hardware queue. 1944 * Additionally, the driver has to then use these HW queue IDs for the queue 1945 * management functions (ieee80211_stop_queue() et al.) 1946 * 1947 * The driver is free to set up the queue mappings as needed, multiple virtual 1948 * interfaces may map to the same hardware queues if needed. The setup has to 1949 * happen during add_interface or change_interface callbacks. For example, a 1950 * driver supporting station+station and station+AP modes might decide to have 1951 * 10 hardware queues to handle different scenarios: 1952 * 1953 * 4 AC HW queues for 1st vif: 0, 1, 2, 3 1954 * 4 AC HW queues for 2nd vif: 4, 5, 6, 7 1955 * after-DTIM queue for AP: 8 1956 * off-channel queue: 9 1957 * 1958 * It would then set up the hardware like this: 1959 * hw.offchannel_tx_hw_queue = 9 1960 * 1961 * and the first virtual interface that is added as follows: 1962 * vif.hw_queue[IEEE80211_AC_VO] = 0 1963 * vif.hw_queue[IEEE80211_AC_VI] = 1 1964 * vif.hw_queue[IEEE80211_AC_BE] = 2 1965 * vif.hw_queue[IEEE80211_AC_BK] = 3 1966 * vif.cab_queue = 8 // if AP mode, otherwise %IEEE80211_INVAL_HW_QUEUE 1967 * and the second virtual interface with 4-7. 1968 * 1969 * If queue 6 gets full, for example, mac80211 would only stop the second 1970 * virtual interface's BE queue since virtual interface queues are per AC. 1971 * 1972 * Note that the vif.cab_queue value should be set to %IEEE80211_INVAL_HW_QUEUE 1973 * whenever the queue is not used (i.e. the interface is not in AP mode) if the 1974 * queue could potentially be shared since mac80211 will look at cab_queue when 1975 * a queue is stopped/woken even if the interface is not in AP mode. 1976 */ 1977 1978/** 1979 * enum ieee80211_filter_flags - hardware filter flags 1980 * 1981 * These flags determine what the filter in hardware should be 1982 * programmed to let through and what should not be passed to the 1983 * stack. It is always safe to pass more frames than requested, 1984 * but this has negative impact on power consumption. 1985 * 1986 * @FIF_PROMISC_IN_BSS: promiscuous mode within your BSS, 1987 * think of the BSS as your network segment and then this corresponds 1988 * to the regular ethernet device promiscuous mode. 1989 * 1990 * @FIF_ALLMULTI: pass all multicast frames, this is used if requested 1991 * by the user or if the hardware is not capable of filtering by 1992 * multicast address. 1993 * 1994 * @FIF_FCSFAIL: pass frames with failed FCS (but you need to set the 1995 * %RX_FLAG_FAILED_FCS_CRC for them) 1996 * 1997 * @FIF_PLCPFAIL: pass frames with failed PLCP CRC (but you need to set 1998 * the %RX_FLAG_FAILED_PLCP_CRC for them 1999 * 2000 * @FIF_BCN_PRBRESP_PROMISC: This flag is set during scanning to indicate 2001 * to the hardware that it should not filter beacons or probe responses 2002 * by BSSID. Filtering them can greatly reduce the amount of processing 2003 * mac80211 needs to do and the amount of CPU wakeups, so you should 2004 * honour this flag if possible. 2005 * 2006 * @FIF_CONTROL: pass control frames (except for PS Poll), if PROMISC_IN_BSS 2007 * is not set then only those addressed to this station. 2008 * 2009 * @FIF_OTHER_BSS: pass frames destined to other BSSes 2010 * 2011 * @FIF_PSPOLL: pass PS Poll frames, if PROMISC_IN_BSS is not set then only 2012 * those addressed to this station. 2013 * 2014 * @FIF_PROBE_REQ: pass probe request frames 2015 */ 2016enum ieee80211_filter_flags { 2017 FIF_PROMISC_IN_BSS = 1<<0, 2018 FIF_ALLMULTI = 1<<1, 2019 FIF_FCSFAIL = 1<<2, 2020 FIF_PLCPFAIL = 1<<3, 2021 FIF_BCN_PRBRESP_PROMISC = 1<<4, 2022 FIF_CONTROL = 1<<5, 2023 FIF_OTHER_BSS = 1<<6, 2024 FIF_PSPOLL = 1<<7, 2025 FIF_PROBE_REQ = 1<<8, 2026}; 2027 2028/** 2029 * enum ieee80211_ampdu_mlme_action - A-MPDU actions 2030 * 2031 * These flags are used with the ampdu_action() callback in 2032 * &struct ieee80211_ops to indicate which action is needed. 2033 * 2034 * Note that drivers MUST be able to deal with a TX aggregation 2035 * session being stopped even before they OK'ed starting it by 2036 * calling ieee80211_start_tx_ba_cb_irqsafe, because the peer 2037 * might receive the addBA frame and send a delBA right away! 2038 * 2039 * @IEEE80211_AMPDU_RX_START: start RX aggregation 2040 * @IEEE80211_AMPDU_RX_STOP: stop RX aggregation 2041 * @IEEE80211_AMPDU_TX_START: start TX aggregation 2042 * @IEEE80211_AMPDU_TX_OPERATIONAL: TX aggregation has become operational 2043 * @IEEE80211_AMPDU_TX_STOP_CONT: stop TX aggregation but continue transmitting 2044 * queued packets, now unaggregated. After all packets are transmitted the 2045 * driver has to call ieee80211_stop_tx_ba_cb_irqsafe(). 2046 * @IEEE80211_AMPDU_TX_STOP_FLUSH: stop TX aggregation and flush all packets, 2047 * called when the station is removed. There's no need or reason to call 2048 * ieee80211_stop_tx_ba_cb_irqsafe() in this case as mac80211 assumes the 2049 * session is gone and removes the station. 2050 * @IEEE80211_AMPDU_TX_STOP_FLUSH_CONT: called when TX aggregation is stopped 2051 * but the driver hasn't called ieee80211_stop_tx_ba_cb_irqsafe() yet and 2052 * now the connection is dropped and the station will be removed. Drivers 2053 * should clean up and drop remaining packets when this is called. 2054 */ 2055enum ieee80211_ampdu_mlme_action { 2056 IEEE80211_AMPDU_RX_START, 2057 IEEE80211_AMPDU_RX_STOP, 2058 IEEE80211_AMPDU_TX_START, 2059 IEEE80211_AMPDU_TX_STOP_CONT, 2060 IEEE80211_AMPDU_TX_STOP_FLUSH, 2061 IEEE80211_AMPDU_TX_STOP_FLUSH_CONT, 2062 IEEE80211_AMPDU_TX_OPERATIONAL, 2063}; 2064 2065/** 2066 * enum ieee80211_frame_release_type - frame release reason 2067 * @IEEE80211_FRAME_RELEASE_PSPOLL: frame released for PS-Poll 2068 * @IEEE80211_FRAME_RELEASE_UAPSD: frame(s) released due to 2069 * frame received on trigger-enabled AC 2070 */ 2071enum ieee80211_frame_release_type { 2072 IEEE80211_FRAME_RELEASE_PSPOLL, 2073 IEEE80211_FRAME_RELEASE_UAPSD, 2074}; 2075 2076/** 2077 * enum ieee80211_rate_control_changed - flags to indicate what changed 2078 * 2079 * @IEEE80211_RC_BW_CHANGED: The bandwidth that can be used to transmit 2080 * to this station changed. 2081 * @IEEE80211_RC_SMPS_CHANGED: The SMPS state of the station changed. 2082 * @IEEE80211_RC_SUPP_RATES_CHANGED: The supported rate set of this peer 2083 * changed (in IBSS mode) due to discovering more information about 2084 * the peer. 2085 */ 2086enum ieee80211_rate_control_changed { 2087 IEEE80211_RC_BW_CHANGED = BIT(0), 2088 IEEE80211_RC_SMPS_CHANGED = BIT(1), 2089 IEEE80211_RC_SUPP_RATES_CHANGED = BIT(2), 2090}; 2091 2092/** 2093 * struct ieee80211_ops - callbacks from mac80211 to the driver 2094 * 2095 * This structure contains various callbacks that the driver may 2096 * handle or, in some cases, must handle, for example to configure 2097 * the hardware to a new channel or to transmit a frame. 2098 * 2099 * @tx: Handler that 802.11 module calls for each transmitted frame. 2100 * skb contains the buffer starting from the IEEE 802.11 header. 2101 * The low-level driver should send the frame out based on 2102 * configuration in the TX control data. This handler should, 2103 * preferably, never fail and stop queues appropriately. 2104 * Must be atomic. 2105 * 2106 * @start: Called before the first netdevice attached to the hardware 2107 * is enabled. This should turn on the hardware and must turn on 2108 * frame reception (for possibly enabled monitor interfaces.) 2109 * Returns negative error codes, these may be seen in userspace, 2110 * or zero. 2111 * When the device is started it should not have a MAC address 2112 * to avoid acknowledging frames before a non-monitor device 2113 * is added. 2114 * Must be implemented and can sleep. 2115 * 2116 * @stop: Called after last netdevice attached to the hardware 2117 * is disabled. This should turn off the hardware (at least 2118 * it must turn off frame reception.) 2119 * May be called right after add_interface if that rejects 2120 * an interface. If you added any work onto the mac80211 workqueue 2121 * you should ensure to cancel it on this callback. 2122 * Must be implemented and can sleep. 2123 * 2124 * @suspend: Suspend the device; mac80211 itself will quiesce before and 2125 * stop transmitting and doing any other configuration, and then 2126 * ask the device to suspend. This is only invoked when WoWLAN is 2127 * configured, otherwise the device is deconfigured completely and 2128 * reconfigured at resume time. 2129 * The driver may also impose special conditions under which it 2130 * wants to use the "normal" suspend (deconfigure), say if it only 2131 * supports WoWLAN when the device is associated. In this case, it 2132 * must return 1 from this function. 2133 * 2134 * @resume: If WoWLAN was configured, this indicates that mac80211 is 2135 * now resuming its operation, after this the device must be fully 2136 * functional again. If this returns an error, the only way out is 2137 * to also unregister the device. If it returns 1, then mac80211 2138 * will also go through the regular complete restart on resume. 2139 * 2140 * @set_wakeup: Enable or disable wakeup when WoWLAN configuration is 2141 * modified. The reason is that device_set_wakeup_enable() is 2142 * supposed to be called when the configuration changes, not only 2143 * in suspend(). 2144 * 2145 * @add_interface: Called when a netdevice attached to the hardware is 2146 * enabled. Because it is not called for monitor mode devices, @start 2147 * and @stop must be implemented. 2148 * The driver should perform any initialization it needs before 2149 * the device can be enabled. The initial configuration for the 2150 * interface is given in the conf parameter. 2151 * The callback may refuse to add an interface by returning a 2152 * negative error code (which will be seen in userspace.) 2153 * Must be implemented and can sleep. 2154 * 2155 * @change_interface: Called when a netdevice changes type. This callback 2156 * is optional, but only if it is supported can interface types be 2157 * switched while the interface is UP. The callback may sleep. 2158 * Note that while an interface is being switched, it will not be 2159 * found by the interface iteration callbacks. 2160 * 2161 * @remove_interface: Notifies a driver that an interface is going down. 2162 * The @stop callback is called after this if it is the last interface 2163 * and no monitor interfaces are present. 2164 * When all interfaces are removed, the MAC address in the hardware 2165 * must be cleared so the device no longer acknowledges packets, 2166 * the mac_addr member of the conf structure is, however, set to the 2167 * MAC address of the device going away. 2168 * Hence, this callback must be implemented. It can sleep. 2169 * 2170 * @config: Handler for configuration requests. IEEE 802.11 code calls this 2171 * function to change hardware configuration, e.g., channel. 2172 * This function should never fail but returns a negative error code 2173 * if it does. The callback can sleep. 2174 * 2175 * @bss_info_changed: Handler for configuration requests related to BSS 2176 * parameters that may vary during BSS's lifespan, and may affect low 2177 * level driver (e.g. assoc/disassoc status, erp parameters). 2178 * This function should not be used if no BSS has been set, unless 2179 * for association indication. The @changed parameter indicates which 2180 * of the bss parameters has changed when a call is made. The callback 2181 * can sleep. 2182 * 2183 * @prepare_multicast: Prepare for multicast filter configuration. 2184 * This callback is optional, and its return value is passed 2185 * to configure_filter(). This callback must be atomic. 2186 * 2187 * @configure_filter: Configure the device's RX filter. 2188 * See the section "Frame filtering" for more information. 2189 * This callback must be implemented and can sleep. 2190 * 2191 * @set_tim: Set TIM bit. mac80211 calls this function when a TIM bit 2192 * must be set or cleared for a given STA. Must be atomic. 2193 * 2194 * @set_key: See the section "Hardware crypto acceleration" 2195 * This callback is only called between add_interface and 2196 * remove_interface calls, i.e. while the given virtual interface 2197 * is enabled. 2198 * Returns a negative error code if the key can't be added. 2199 * The callback can sleep. 2200 * 2201 * @update_tkip_key: See the section "Hardware crypto acceleration" 2202 * This callback will be called in the context of Rx. Called for drivers 2203 * which set IEEE80211_KEY_FLAG_TKIP_REQ_RX_P1_KEY. 2204 * The callback must be atomic. 2205 * 2206 * @set_rekey_data: If the device supports GTK rekeying, for example while the 2207 * host is suspended, it can assign this callback to retrieve the data 2208 * necessary to do GTK rekeying, this is the KEK, KCK and replay counter. 2209 * After rekeying was done it should (for example during resume) notify 2210 * userspace of the new replay counter using ieee80211_gtk_rekey_notify(). 2211 * 2212 * @set_default_unicast_key: Set the default (unicast) key index, useful for 2213 * WEP when the device sends data packets autonomously, e.g. for ARP 2214 * offloading. The index can be 0-3, or -1 for unsetting it. 2215 * 2216 * @hw_scan: Ask the hardware to service the scan request, no need to start 2217 * the scan state machine in stack. The scan must honour the channel 2218 * configuration done by the regulatory agent in the wiphy's 2219 * registered bands. The hardware (or the driver) needs to make sure 2220 * that power save is disabled. 2221 * The @req ie/ie_len members are rewritten by mac80211 to contain the 2222 * entire IEs after the SSID, so that drivers need not look at these 2223 * at all but just send them after the SSID -- mac80211 includes the 2224 * (extended) supported rates and HT information (where applicable). 2225 * When the scan finishes, ieee80211_scan_completed() must be called; 2226 * note that it also must be called when the scan cannot finish due to 2227 * any error unless this callback returned a negative error code. 2228 * The callback can sleep. 2229 * 2230 * @cancel_hw_scan: Ask the low-level tp cancel the active hw scan. 2231 * The driver should ask the hardware to cancel the scan (if possible), 2232 * but the scan will be completed only after the driver will call 2233 * ieee80211_scan_completed(). 2234 * This callback is needed for wowlan, to prevent enqueueing a new 2235 * scan_work after the low-level driver was already suspended. 2236 * The callback can sleep. 2237 * 2238 * @sched_scan_start: Ask the hardware to start scanning repeatedly at 2239 * specific intervals. The driver must call the 2240 * ieee80211_sched_scan_results() function whenever it finds results. 2241 * This process will continue until sched_scan_stop is called. 2242 * 2243 * @sched_scan_stop: Tell the hardware to stop an ongoing scheduled scan. 2244 * 2245 * @sw_scan_start: Notifier function that is called just before a software scan 2246 * is started. Can be NULL, if the driver doesn't need this notification. 2247 * The callback can sleep. 2248 * 2249 * @sw_scan_complete: Notifier function that is called just after a 2250 * software scan finished. Can be NULL, if the driver doesn't need 2251 * this notification. 2252 * The callback can sleep. 2253 * 2254 * @get_stats: Return low-level statistics. 2255 * Returns zero if statistics are available. 2256 * The callback can sleep. 2257 * 2258 * @get_tkip_seq: If your device implements TKIP encryption in hardware this 2259 * callback should be provided to read the TKIP transmit IVs (both IV32 2260 * and IV16) for the given key from hardware. 2261 * The callback must be atomic. 2262 * 2263 * @set_frag_threshold: Configuration of fragmentation threshold. Assign this 2264 * if the device does fragmentation by itself; if this callback is 2265 * implemented then the stack will not do fragmentation. 2266 * The callback can sleep. 2267 * 2268 * @set_rts_threshold: Configuration of RTS threshold (if device needs it) 2269 * The callback can sleep. 2270 * 2271 * @sta_add: Notifies low level driver about addition of an associated station, 2272 * AP, IBSS/WDS/mesh peer etc. This callback can sleep. 2273 * 2274 * @sta_remove: Notifies low level driver about removal of an associated 2275 * station, AP, IBSS/WDS/mesh peer etc. This callback can sleep. 2276 * 2277 * @sta_add_debugfs: Drivers can use this callback to add debugfs files 2278 * when a station is added to mac80211's station list. This callback 2279 * and @sta_remove_debugfs should be within a CONFIG_MAC80211_DEBUGFS 2280 * conditional. This callback can sleep. 2281 * 2282 * @sta_remove_debugfs: Remove the debugfs files which were added using 2283 * @sta_add_debugfs. This callback can sleep. 2284 * 2285 * @sta_notify: Notifies low level driver about power state transition of an 2286 * associated station, AP, IBSS/WDS/mesh peer etc. For a VIF operating 2287 * in AP mode, this callback will not be called when the flag 2288 * %IEEE80211_HW_AP_LINK_PS is set. Must be atomic. 2289 * 2290 * @sta_state: Notifies low level driver about state transition of a 2291 * station (which can be the AP, a client, IBSS/WDS/mesh peer etc.) 2292 * This callback is mutually exclusive with @sta_add/@sta_remove. 2293 * It must not fail for down transitions but may fail for transitions 2294 * up the list of states. 2295 * The callback can sleep. 2296 * 2297 * @sta_rc_update: Notifies the driver of changes to the bitrates that can be 2298 * used to transmit to the station. The changes are advertised with bits 2299 * from &enum ieee80211_rate_control_changed and the values are reflected 2300 * in the station data. This callback should only be used when the driver 2301 * uses hardware rate control (%IEEE80211_HW_HAS_RATE_CONTROL) since 2302 * otherwise the rate control algorithm is notified directly. 2303 * Must be atomic. 2304 * 2305 * @conf_tx: Configure TX queue parameters (EDCF (aifs, cw_min, cw_max), 2306 * bursting) for a hardware TX queue. 2307 * Returns a negative error code on failure. 2308 * The callback can sleep. 2309 * 2310 * @get_tsf: Get the current TSF timer value from firmware/hardware. Currently, 2311 * this is only used for IBSS mode BSSID merging and debugging. Is not a 2312 * required function. 2313 * The callback can sleep. 2314 * 2315 * @set_tsf: Set the TSF timer to the specified value in the firmware/hardware. 2316 * Currently, this is only used for IBSS mode debugging. Is not a 2317 * required function. 2318 * The callback can sleep. 2319 * 2320 * @reset_tsf: Reset the TSF timer and allow firmware/hardware to synchronize 2321 * with other STAs in the IBSS. This is only used in IBSS mode. This 2322 * function is optional if the firmware/hardware takes full care of 2323 * TSF synchronization. 2324 * The callback can sleep. 2325 * 2326 * @tx_last_beacon: Determine whether the last IBSS beacon was sent by us. 2327 * This is needed only for IBSS mode and the result of this function is 2328 * used to determine whether to reply to Probe Requests. 2329 * Returns non-zero if this device sent the last beacon. 2330 * The callback can sleep. 2331 * 2332 * @ampdu_action: Perform a certain A-MPDU action 2333 * The RA/TID combination determines the destination and TID we want 2334 * the ampdu action to be performed for. The action is defined through 2335 * ieee80211_ampdu_mlme_action. Starting sequence number (@ssn) 2336 * is the first frame we expect to perform the action on. Notice 2337 * that TX/RX_STOP can pass NULL for this parameter. 2338 * The @buf_size parameter is only valid when the action is set to 2339 * %IEEE80211_AMPDU_TX_OPERATIONAL and indicates the peer's reorder 2340 * buffer size (number of subframes) for this session -- the driver 2341 * may neither send aggregates containing more subframes than this 2342 * nor send aggregates in a way that lost frames would exceed the 2343 * buffer size. If just limiting the aggregate size, this would be 2344 * possible with a buf_size of 8: 2345 * - TX: 1.....7 2346 * - RX: 2....7 (lost frame #1) 2347 * - TX: 8..1... 2348 * which is invalid since #1 was now re-transmitted well past the 2349 * buffer size of 8. Correct ways to retransmit #1 would be: 2350 * - TX: 1 or 18 or 81 2351 * Even "189" would be wrong since 1 could be lost again. 2352 * 2353 * Returns a negative error code on failure. 2354 * The callback can sleep. 2355 * 2356 * @get_survey: Return per-channel survey information 2357 * 2358 * @rfkill_poll: Poll rfkill hardware state. If you need this, you also 2359 * need to set wiphy->rfkill_poll to %true before registration, 2360 * and need to call wiphy_rfkill_set_hw_state() in the callback. 2361 * The callback can sleep. 2362 * 2363 * @set_coverage_class: Set slot time for given coverage class as specified 2364 * in IEEE 802.11-2007 section 17.3.8.6 and modify ACK timeout 2365 * accordingly. This callback is not required and may sleep. 2366 * 2367 * @testmode_cmd: Implement a cfg80211 test mode command. 2368 * The callback can sleep. 2369 * @testmode_dump: Implement a cfg80211 test mode dump. The callback can sleep. 2370 * 2371 * @flush: Flush all pending frames from the hardware queue, making sure 2372 * that the hardware queues are empty. If the parameter @drop is set 2373 * to %true, pending frames may be dropped. The callback can sleep. 2374 * 2375 * @channel_switch: Drivers that need (or want) to offload the channel 2376 * switch operation for CSAs received from the AP may implement this 2377 * callback. They must then call ieee80211_chswitch_done() to indicate 2378 * completion of the channel switch. 2379 * 2380 * @napi_poll: Poll Rx queue for incoming data frames. 2381 * 2382 * @set_antenna: Set antenna configuration (tx_ant, rx_ant) on the device. 2383 * Parameters are bitmaps of allowed antennas to use for TX/RX. Drivers may 2384 * reject TX/RX mask combinations they cannot support by returning -EINVAL 2385 * (also see nl80211.h @NL80211_ATTR_WIPHY_ANTENNA_TX). 2386 * 2387 * @get_antenna: Get current antenna configuration from device (tx_ant, rx_ant). 2388 * 2389 * @remain_on_channel: Starts an off-channel period on the given channel, must 2390 * call back to ieee80211_ready_on_channel() when on that channel. Note 2391 * that normal channel traffic is not stopped as this is intended for hw 2392 * offload. Frames to transmit on the off-channel channel are transmitted 2393 * normally except for the %IEEE80211_TX_CTL_TX_OFFCHAN flag. When the 2394 * duration (which will always be non-zero) expires, the driver must call 2395 * ieee80211_remain_on_channel_expired(). 2396 * Note that this callback may be called while the device is in IDLE and 2397 * must be accepted in this case. 2398 * This callback may sleep. 2399 * @cancel_remain_on_channel: Requests that an ongoing off-channel period is 2400 * aborted before it expires. This callback may sleep. 2401 * 2402 * @set_ringparam: Set tx and rx ring sizes. 2403 * 2404 * @get_ringparam: Get tx and rx ring current and maximum sizes. 2405 * 2406 * @tx_frames_pending: Check if there is any pending frame in the hardware 2407 * queues before entering power save. 2408 * 2409 * @set_bitrate_mask: Set a mask of rates to be used for rate control selection 2410 * when transmitting a frame. Currently only legacy rates are handled. 2411 * The callback can sleep. 2412 * @rssi_callback: Notify driver when the average RSSI goes above/below 2413 * thresholds that were registered previously. The callback can sleep. 2414 * 2415 * @release_buffered_frames: Release buffered frames according to the given 2416 * parameters. In the case where the driver buffers some frames for 2417 * sleeping stations mac80211 will use this callback to tell the driver 2418 * to release some frames, either for PS-poll or uAPSD. 2419 * Note that if the @more_data paramter is %false the driver must check 2420 * if there are more frames on the given TIDs, and if there are more than 2421 * the frames being released then it must still set the more-data bit in 2422 * the frame. If the @more_data parameter is %true, then of course the 2423 * more-data bit must always be set. 2424 * The @tids parameter tells the driver which TIDs to release frames 2425 * from, for PS-poll it will always have only a single bit set. 2426 * In the case this is used for a PS-poll initiated release, the 2427 * @num_frames parameter will always be 1 so code can be shared. In 2428 * this case the driver must also set %IEEE80211_TX_STATUS_EOSP flag 2429 * on the TX status (and must report TX status) so that the PS-poll 2430 * period is properly ended. This is used to avoid sending multiple 2431 * responses for a retried PS-poll frame. 2432 * In the case this is used for uAPSD, the @num_frames parameter may be 2433 * bigger than one, but the driver may send fewer frames (it must send 2434 * at least one, however). In this case it is also responsible for 2435 * setting the EOSP flag in the QoS header of the frames. Also, when the 2436 * service period ends, the driver must set %IEEE80211_TX_STATUS_EOSP 2437 * on the last frame in the SP. Alternatively, it may call the function 2438 * ieee80211_sta_eosp_irqsafe() to inform mac80211 of the end of the SP. 2439 * This callback must be atomic. 2440 * @allow_buffered_frames: Prepare device to allow the given number of frames 2441 * to go out to the given station. The frames will be sent by mac80211 2442 * via the usual TX path after this call. The TX information for frames 2443 * released will also have the %IEEE80211_TX_CTL_NO_PS_BUFFER flag set 2444 * and the last one will also have %IEEE80211_TX_STATUS_EOSP set. In case 2445 * frames from multiple TIDs are released and the driver might reorder 2446 * them between the TIDs, it must set the %IEEE80211_TX_STATUS_EOSP flag 2447 * on the last frame and clear it on all others and also handle the EOSP 2448 * bit in the QoS header correctly. Alternatively, it can also call the 2449 * ieee80211_sta_eosp_irqsafe() function. 2450 * The @tids parameter is a bitmap and tells the driver which TIDs the 2451 * frames will be on; it will at most have two bits set. 2452 * This callback must be atomic. 2453 * 2454 * @get_et_sset_count: Ethtool API to get string-set count. 2455 * 2456 * @get_et_stats: Ethtool API to get a set of u64 stats. 2457 * 2458 * @get_et_strings: Ethtool API to get a set of strings to describe stats 2459 * and perhaps other supported types of ethtool data-sets. 2460 * 2461 * @get_rssi: Get current signal strength in dBm, the function is optional 2462 * and can sleep. 2463 * 2464 * @mgd_prepare_tx: Prepare for transmitting a management frame for association 2465 * before associated. In multi-channel scenarios, a virtual interface is 2466 * bound to a channel before it is associated, but as it isn't associated 2467 * yet it need not necessarily be given airtime, in particular since any 2468 * transmission to a P2P GO needs to be synchronized against the GO's 2469 * powersave state. mac80211 will call this function before transmitting a 2470 * management frame prior to having successfully associated to allow the 2471 * driver to give it channel time for the transmission, to get a response 2472 * and to be able to synchronize with the GO. 2473 * The callback will be called before each transmission and upon return 2474 * mac80211 will transmit the frame right away. 2475 * The callback is optional and can (should!) sleep. 2476 * 2477 * @add_chanctx: Notifies device driver about new channel context creation. 2478 * @remove_chanctx: Notifies device driver about channel context destruction. 2479 * @change_chanctx: Notifies device driver about channel context changes that 2480 * may happen when combining different virtual interfaces on the same 2481 * channel context with different settings 2482 * @assign_vif_chanctx: Notifies device driver about channel context being bound 2483 * to vif. Possible use is for hw queue remapping. 2484 * @unassign_vif_chanctx: Notifies device driver about channel context being 2485 * unbound from vif. 2486 * @start_ap: Start operation on the AP interface, this is called after all the 2487 * information in bss_conf is set and beacon can be retrieved. A channel 2488 * context is bound before this is called. Note that if the driver uses 2489 * software scan or ROC, this (and @stop_ap) isn't called when the AP is 2490 * just "paused" for scanning/ROC, which is indicated by the beacon being 2491 * disabled/enabled via @bss_info_changed. 2492 * @stop_ap: Stop operation on the AP interface. 2493 * 2494 * @restart_complete: Called after a call to ieee80211_restart_hw(), when the 2495 * reconfiguration has completed. This can help the driver implement the 2496 * reconfiguration step. Also called when reconfiguring because the 2497 * driver's resume function returned 1, as this is just like an "inline" 2498 * hardware restart. This callback may sleep. 2499 * 2500 * @ipv6_addr_change: IPv6 address assignment on the given interface changed. 2501 * Currently, this is only called for managed or P2P client interfaces. 2502 * This callback is optional; it must not sleep. 2503 */ 2504struct ieee80211_ops { 2505 void (*tx)(struct ieee80211_hw *hw, 2506 struct ieee80211_tx_control *control, 2507 struct sk_buff *skb); 2508 int (*start)(struct ieee80211_hw *hw); 2509 void (*stop)(struct ieee80211_hw *hw); 2510#ifdef CONFIG_PM 2511 int (*suspend)(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan); 2512 int (*resume)(struct ieee80211_hw *hw); 2513 void (*set_wakeup)(struct ieee80211_hw *hw, bool enabled); 2514#endif 2515 int (*add_interface)(struct ieee80211_hw *hw, 2516 struct ieee80211_vif *vif); 2517 int (*change_interface)(struct ieee80211_hw *hw, 2518 struct ieee80211_vif *vif, 2519 enum nl80211_iftype new_type, bool p2p); 2520 void (*remove_interface)(struct ieee80211_hw *hw, 2521 struct ieee80211_vif *vif); 2522 int (*config)(struct ieee80211_hw *hw, u32 changed); 2523 void (*bss_info_changed)(struct ieee80211_hw *hw, 2524 struct ieee80211_vif *vif, 2525 struct ieee80211_bss_conf *info, 2526 u32 changed); 2527 2528 int (*start_ap)(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 2529 void (*stop_ap)(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 2530 2531 u64 (*prepare_multicast)(struct ieee80211_hw *hw, 2532 struct netdev_hw_addr_list *mc_list); 2533 void (*configure_filter)(struct ieee80211_hw *hw, 2534 unsigned int changed_flags, 2535 unsigned int *total_flags, 2536 u64 multicast); 2537 int (*set_tim)(struct ieee80211_hw *hw, struct ieee80211_sta *sta, 2538 bool set); 2539 int (*set_key)(struct ieee80211_hw *hw, enum set_key_cmd cmd, 2540 struct ieee80211_vif *vif, struct ieee80211_sta *sta, 2541 struct ieee80211_key_conf *key); 2542 void (*update_tkip_key)(struct ieee80211_hw *hw, 2543 struct ieee80211_vif *vif, 2544 struct ieee80211_key_conf *conf, 2545 struct ieee80211_sta *sta, 2546 u32 iv32, u16 *phase1key); 2547 void (*set_rekey_data)(struct ieee80211_hw *hw, 2548 struct ieee80211_vif *vif, 2549 struct cfg80211_gtk_rekey_data *data); 2550 void (*set_default_unicast_key)(struct ieee80211_hw *hw, 2551 struct ieee80211_vif *vif, int idx); 2552 int (*hw_scan)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2553 struct cfg80211_scan_request *req); 2554 void (*cancel_hw_scan)(struct ieee80211_hw *hw, 2555 struct ieee80211_vif *vif); 2556 int (*sched_scan_start)(struct ieee80211_hw *hw, 2557 struct ieee80211_vif *vif, 2558 struct cfg80211_sched_scan_request *req, 2559 struct ieee80211_sched_scan_ies *ies); 2560 void (*sched_scan_stop)(struct ieee80211_hw *hw, 2561 struct ieee80211_vif *vif); 2562 void (*sw_scan_start)(struct ieee80211_hw *hw); 2563 void (*sw_scan_complete)(struct ieee80211_hw *hw); 2564 int (*get_stats)(struct ieee80211_hw *hw, 2565 struct ieee80211_low_level_stats *stats); 2566 void (*get_tkip_seq)(struct ieee80211_hw *hw, u8 hw_key_idx, 2567 u32 *iv32, u16 *iv16); 2568 int (*set_frag_threshold)(struct ieee80211_hw *hw, u32 value); 2569 int (*set_rts_threshold)(struct ieee80211_hw *hw, u32 value); 2570 int (*sta_add)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2571 struct ieee80211_sta *sta); 2572 int (*sta_remove)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2573 struct ieee80211_sta *sta); 2574#ifdef CONFIG_MAC80211_DEBUGFS 2575 void (*sta_add_debugfs)(struct ieee80211_hw *hw, 2576 struct ieee80211_vif *vif, 2577 struct ieee80211_sta *sta, 2578 struct dentry *dir); 2579 void (*sta_remove_debugfs)(struct ieee80211_hw *hw, 2580 struct ieee80211_vif *vif, 2581 struct ieee80211_sta *sta, 2582 struct dentry *dir); 2583#endif 2584 void (*sta_notify)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2585 enum sta_notify_cmd, struct ieee80211_sta *sta); 2586 int (*sta_state)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2587 struct ieee80211_sta *sta, 2588 enum ieee80211_sta_state old_state, 2589 enum ieee80211_sta_state new_state); 2590 void (*sta_rc_update)(struct ieee80211_hw *hw, 2591 struct ieee80211_vif *vif, 2592 struct ieee80211_sta *sta, 2593 u32 changed); 2594 int (*conf_tx)(struct ieee80211_hw *hw, 2595 struct ieee80211_vif *vif, u16 ac, 2596 const struct ieee80211_tx_queue_params *params); 2597 u64 (*get_tsf)(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 2598 void (*set_tsf)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2599 u64 tsf); 2600 void (*reset_tsf)(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 2601 int (*tx_last_beacon)(struct ieee80211_hw *hw); 2602 int (*ampdu_action)(struct ieee80211_hw *hw, 2603 struct ieee80211_vif *vif, 2604 enum ieee80211_ampdu_mlme_action action, 2605 struct ieee80211_sta *sta, u16 tid, u16 *ssn, 2606 u8 buf_size); 2607 int (*get_survey)(struct ieee80211_hw *hw, int idx, 2608 struct survey_info *survey); 2609 void (*rfkill_poll)(struct ieee80211_hw *hw); 2610 void (*set_coverage_class)(struct ieee80211_hw *hw, u8 coverage_class); 2611#ifdef CONFIG_NL80211_TESTMODE 2612 int (*testmode_cmd)(struct ieee80211_hw *hw, void *data, int len); 2613 int (*testmode_dump)(struct ieee80211_hw *hw, struct sk_buff *skb, 2614 struct netlink_callback *cb, 2615 void *data, int len); 2616#endif 2617 void (*flush)(struct ieee80211_hw *hw, bool drop); 2618 void (*channel_switch)(struct ieee80211_hw *hw, 2619 struct ieee80211_channel_switch *ch_switch); 2620 int (*napi_poll)(struct ieee80211_hw *hw, int budget); 2621 int (*set_antenna)(struct ieee80211_hw *hw, u32 tx_ant, u32 rx_ant); 2622 int (*get_antenna)(struct ieee80211_hw *hw, u32 *tx_ant, u32 *rx_ant); 2623 2624 int (*remain_on_channel)(struct ieee80211_hw *hw, 2625 struct ieee80211_vif *vif, 2626 struct ieee80211_channel *chan, 2627 int duration); 2628 int (*cancel_remain_on_channel)(struct ieee80211_hw *hw); 2629 int (*set_ringparam)(struct ieee80211_hw *hw, u32 tx, u32 rx); 2630 void (*get_ringparam)(struct ieee80211_hw *hw, 2631 u32 *tx, u32 *tx_max, u32 *rx, u32 *rx_max); 2632 bool (*tx_frames_pending)(struct ieee80211_hw *hw); 2633 int (*set_bitrate_mask)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2634 const struct cfg80211_bitrate_mask *mask); 2635 void (*rssi_callback)(struct ieee80211_hw *hw, 2636 enum ieee80211_rssi_event rssi_event); 2637 2638 void (*allow_buffered_frames)(struct ieee80211_hw *hw, 2639 struct ieee80211_sta *sta, 2640 u16 tids, int num_frames, 2641 enum ieee80211_frame_release_type reason, 2642 bool more_data); 2643 void (*release_buffered_frames)(struct ieee80211_hw *hw, 2644 struct ieee80211_sta *sta, 2645 u16 tids, int num_frames, 2646 enum ieee80211_frame_release_type reason, 2647 bool more_data); 2648 2649 int (*get_et_sset_count)(struct ieee80211_hw *hw, 2650 struct ieee80211_vif *vif, int sset); 2651 void (*get_et_stats)(struct ieee80211_hw *hw, 2652 struct ieee80211_vif *vif, 2653 struct ethtool_stats *stats, u64 *data); 2654 void (*get_et_strings)(struct ieee80211_hw *hw, 2655 struct ieee80211_vif *vif, 2656 u32 sset, u8 *data); 2657 int (*get_rssi)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2658 struct ieee80211_sta *sta, s8 *rssi_dbm); 2659 2660 void (*mgd_prepare_tx)(struct ieee80211_hw *hw, 2661 struct ieee80211_vif *vif); 2662 2663 int (*add_chanctx)(struct ieee80211_hw *hw, 2664 struct ieee80211_chanctx_conf *ctx); 2665 void (*remove_chanctx)(struct ieee80211_hw *hw, 2666 struct ieee80211_chanctx_conf *ctx); 2667 void (*change_chanctx)(struct ieee80211_hw *hw, 2668 struct ieee80211_chanctx_conf *ctx, 2669 u32 changed); 2670 int (*assign_vif_chanctx)(struct ieee80211_hw *hw, 2671 struct ieee80211_vif *vif, 2672 struct ieee80211_chanctx_conf *ctx); 2673 void (*unassign_vif_chanctx)(struct ieee80211_hw *hw, 2674 struct ieee80211_vif *vif, 2675 struct ieee80211_chanctx_conf *ctx); 2676 2677 void (*restart_complete)(struct ieee80211_hw *hw); 2678 2679#if IS_ENABLED(CONFIG_IPV6) 2680 void (*ipv6_addr_change)(struct ieee80211_hw *hw, 2681 struct ieee80211_vif *vif, 2682 struct inet6_dev *idev); 2683#endif 2684}; 2685 2686/** 2687 * ieee80211_alloc_hw - Allocate a new hardware device 2688 * 2689 * This must be called once for each hardware device. The returned pointer 2690 * must be used to refer to this device when calling other functions. 2691 * mac80211 allocates a private data area for the driver pointed to by 2692 * @priv in &struct ieee80211_hw, the size of this area is given as 2693 * @priv_data_len. 2694 * 2695 * @priv_data_len: length of private data 2696 * @ops: callbacks for this device 2697 * 2698 * Return: A pointer to the new hardware device, or %NULL on error. 2699 */ 2700struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len, 2701 const struct ieee80211_ops *ops); 2702 2703/** 2704 * ieee80211_register_hw - Register hardware device 2705 * 2706 * You must call this function before any other functions in 2707 * mac80211. Note that before a hardware can be registered, you 2708 * need to fill the contained wiphy's information. 2709 * 2710 * @hw: the device to register as returned by ieee80211_alloc_hw() 2711 * 2712 * Return: 0 on success. An error code otherwise. 2713 */ 2714int ieee80211_register_hw(struct ieee80211_hw *hw); 2715 2716/** 2717 * struct ieee80211_tpt_blink - throughput blink description 2718 * @throughput: throughput in Kbit/sec 2719 * @blink_time: blink time in milliseconds 2720 * (full cycle, ie. one off + one on period) 2721 */ 2722struct ieee80211_tpt_blink { 2723 int throughput; 2724 int blink_time; 2725}; 2726 2727/** 2728 * enum ieee80211_tpt_led_trigger_flags - throughput trigger flags 2729 * @IEEE80211_TPT_LEDTRIG_FL_RADIO: enable blinking with radio 2730 * @IEEE80211_TPT_LEDTRIG_FL_WORK: enable blinking when working 2731 * @IEEE80211_TPT_LEDTRIG_FL_CONNECTED: enable blinking when at least one 2732 * interface is connected in some way, including being an AP 2733 */ 2734enum ieee80211_tpt_led_trigger_flags { 2735 IEEE80211_TPT_LEDTRIG_FL_RADIO = BIT(0), 2736 IEEE80211_TPT_LEDTRIG_FL_WORK = BIT(1), 2737 IEEE80211_TPT_LEDTRIG_FL_CONNECTED = BIT(2), 2738}; 2739 2740#ifdef CONFIG_MAC80211_LEDS 2741extern char *__ieee80211_get_tx_led_name(struct ieee80211_hw *hw); 2742extern char *__ieee80211_get_rx_led_name(struct ieee80211_hw *hw); 2743extern char *__ieee80211_get_assoc_led_name(struct ieee80211_hw *hw); 2744extern char *__ieee80211_get_radio_led_name(struct ieee80211_hw *hw); 2745extern char *__ieee80211_create_tpt_led_trigger( 2746 struct ieee80211_hw *hw, unsigned int flags, 2747 const struct ieee80211_tpt_blink *blink_table, 2748 unsigned int blink_table_len); 2749#endif 2750/** 2751 * ieee80211_get_tx_led_name - get name of TX LED 2752 * 2753 * mac80211 creates a transmit LED trigger for each wireless hardware 2754 * that can be used to drive LEDs if your driver registers a LED device. 2755 * This function returns the name (or %NULL if not configured for LEDs) 2756 * of the trigger so you can automatically link the LED device. 2757 * 2758 * @hw: the hardware to get the LED trigger name for 2759 * 2760 * Return: The name of the LED trigger. %NULL if not configured for LEDs. 2761 */ 2762static inline char *ieee80211_get_tx_led_name(struct ieee80211_hw *hw) 2763{ 2764#ifdef CONFIG_MAC80211_LEDS 2765 return __ieee80211_get_tx_led_name(hw); 2766#else 2767 return NULL; 2768#endif 2769} 2770 2771/** 2772 * ieee80211_get_rx_led_name - get name of RX LED 2773 * 2774 * mac80211 creates a receive LED trigger for each wireless hardware 2775 * that can be used to drive LEDs if your driver registers a LED device. 2776 * This function returns the name (or %NULL if not configured for LEDs) 2777 * of the trigger so you can automatically link the LED device. 2778 * 2779 * @hw: the hardware to get the LED trigger name for 2780 * 2781 * Return: The name of the LED trigger. %NULL if not configured for LEDs. 2782 */ 2783static inline char *ieee80211_get_rx_led_name(struct ieee80211_hw *hw) 2784{ 2785#ifdef CONFIG_MAC80211_LEDS 2786 return __ieee80211_get_rx_led_name(hw); 2787#else 2788 return NULL; 2789#endif 2790} 2791 2792/** 2793 * ieee80211_get_assoc_led_name - get name of association LED 2794 * 2795 * mac80211 creates a association LED trigger for each wireless hardware 2796 * that can be used to drive LEDs if your driver registers a LED device. 2797 * This function returns the name (or %NULL if not configured for LEDs) 2798 * of the trigger so you can automatically link the LED device. 2799 * 2800 * @hw: the hardware to get the LED trigger name for 2801 * 2802 * Return: The name of the LED trigger. %NULL if not configured for LEDs. 2803 */ 2804static inline char *ieee80211_get_assoc_led_name(struct ieee80211_hw *hw) 2805{ 2806#ifdef CONFIG_MAC80211_LEDS 2807 return __ieee80211_get_assoc_led_name(hw); 2808#else 2809 return NULL; 2810#endif 2811} 2812 2813/** 2814 * ieee80211_get_radio_led_name - get name of radio LED 2815 * 2816 * mac80211 creates a radio change LED trigger for each wireless hardware 2817 * that can be used to drive LEDs if your driver registers a LED device. 2818 * This function returns the name (or %NULL if not configured for LEDs) 2819 * of the trigger so you can automatically link the LED device. 2820 * 2821 * @hw: the hardware to get the LED trigger name for 2822 * 2823 * Return: The name of the LED trigger. %NULL if not configured for LEDs. 2824 */ 2825static inline char *ieee80211_get_radio_led_name(struct ieee80211_hw *hw) 2826{ 2827#ifdef CONFIG_MAC80211_LEDS 2828 return __ieee80211_get_radio_led_name(hw); 2829#else 2830 return NULL; 2831#endif 2832} 2833 2834/** 2835 * ieee80211_create_tpt_led_trigger - create throughput LED trigger 2836 * @hw: the hardware to create the trigger for 2837 * @flags: trigger flags, see &enum ieee80211_tpt_led_trigger_flags 2838 * @blink_table: the blink table -- needs to be ordered by throughput 2839 * @blink_table_len: size of the blink table 2840 * 2841 * Return: %NULL (in case of error, or if no LED triggers are 2842 * configured) or the name of the new trigger. 2843 * 2844 * Note: This function must be called before ieee80211_register_hw(). 2845 */ 2846static inline char * 2847ieee80211_create_tpt_led_trigger(struct ieee80211_hw *hw, unsigned int flags, 2848 const struct ieee80211_tpt_blink *blink_table, 2849 unsigned int blink_table_len) 2850{ 2851#ifdef CONFIG_MAC80211_LEDS 2852 return __ieee80211_create_tpt_led_trigger(hw, flags, blink_table, 2853 blink_table_len); 2854#else 2855 return NULL; 2856#endif 2857} 2858 2859/** 2860 * ieee80211_unregister_hw - Unregister a hardware device 2861 * 2862 * This function instructs mac80211 to free allocated resources 2863 * and unregister netdevices from the networking subsystem. 2864 * 2865 * @hw: the hardware to unregister 2866 */ 2867void ieee80211_unregister_hw(struct ieee80211_hw *hw); 2868 2869/** 2870 * ieee80211_free_hw - free hardware descriptor 2871 * 2872 * This function frees everything that was allocated, including the 2873 * private data for the driver. You must call ieee80211_unregister_hw() 2874 * before calling this function. 2875 * 2876 * @hw: the hardware to free 2877 */ 2878void ieee80211_free_hw(struct ieee80211_hw *hw); 2879 2880/** 2881 * ieee80211_restart_hw - restart hardware completely 2882 * 2883 * Call this function when the hardware was restarted for some reason 2884 * (hardware error, ...) and the driver is unable to restore its state 2885 * by itself. mac80211 assumes that at this point the driver/hardware 2886 * is completely uninitialised and stopped, it starts the process by 2887 * calling the ->start() operation. The driver will need to reset all 2888 * internal state that it has prior to calling this function. 2889 * 2890 * @hw: the hardware to restart 2891 */ 2892void ieee80211_restart_hw(struct ieee80211_hw *hw); 2893 2894/** ieee80211_napi_schedule - schedule NAPI poll 2895 * 2896 * Use this function to schedule NAPI polling on a device. 2897 * 2898 * @hw: the hardware to start polling 2899 */ 2900void ieee80211_napi_schedule(struct ieee80211_hw *hw); 2901 2902/** ieee80211_napi_complete - complete NAPI polling 2903 * 2904 * Use this function to finish NAPI polling on a device. 2905 * 2906 * @hw: the hardware to stop polling 2907 */ 2908void ieee80211_napi_complete(struct ieee80211_hw *hw); 2909 2910/** 2911 * ieee80211_rx - receive frame 2912 * 2913 * Use this function to hand received frames to mac80211. The receive 2914 * buffer in @skb must start with an IEEE 802.11 header. In case of a 2915 * paged @skb is used, the driver is recommended to put the ieee80211 2916 * header of the frame on the linear part of the @skb to avoid memory 2917 * allocation and/or memcpy by the stack. 2918 * 2919 * This function may not be called in IRQ context. Calls to this function 2920 * for a single hardware must be synchronized against each other. Calls to 2921 * this function, ieee80211_rx_ni() and ieee80211_rx_irqsafe() may not be 2922 * mixed for a single hardware. 2923 * 2924 * In process context use instead ieee80211_rx_ni(). 2925 * 2926 * @hw: the hardware this frame came in on 2927 * @skb: the buffer to receive, owned by mac80211 after this call 2928 */ 2929void ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb); 2930 2931/** 2932 * ieee80211_rx_irqsafe - receive frame 2933 * 2934 * Like ieee80211_rx() but can be called in IRQ context 2935 * (internally defers to a tasklet.) 2936 * 2937 * Calls to this function, ieee80211_rx() or ieee80211_rx_ni() may not 2938 * be mixed for a single hardware. 2939 * 2940 * @hw: the hardware this frame came in on 2941 * @skb: the buffer to receive, owned by mac80211 after this call 2942 */ 2943void ieee80211_rx_irqsafe(struct ieee80211_hw *hw, struct sk_buff *skb); 2944 2945/** 2946 * ieee80211_rx_ni - receive frame (in process context) 2947 * 2948 * Like ieee80211_rx() but can be called in process context 2949 * (internally disables bottom halves). 2950 * 2951 * Calls to this function, ieee80211_rx() and ieee80211_rx_irqsafe() may 2952 * not be mixed for a single hardware. 2953 * 2954 * @hw: the hardware this frame came in on 2955 * @skb: the buffer to receive, owned by mac80211 after this call 2956 */ 2957static inline void ieee80211_rx_ni(struct ieee80211_hw *hw, 2958 struct sk_buff *skb) 2959{ 2960 local_bh_disable(); 2961 ieee80211_rx(hw, skb); 2962 local_bh_enable(); 2963} 2964 2965/** 2966 * ieee80211_sta_ps_transition - PS transition for connected sta 2967 * 2968 * When operating in AP mode with the %IEEE80211_HW_AP_LINK_PS 2969 * flag set, use this function to inform mac80211 about a connected station 2970 * entering/leaving PS mode. 2971 * 2972 * This function may not be called in IRQ context or with softirqs enabled. 2973 * 2974 * Calls to this function for a single hardware must be synchronized against 2975 * each other. 2976 * 2977 * @sta: currently connected sta 2978 * @start: start or stop PS 2979 * 2980 * Return: 0 on success. -EINVAL when the requested PS mode is already set. 2981 */ 2982int ieee80211_sta_ps_transition(struct ieee80211_sta *sta, bool start); 2983 2984/** 2985 * ieee80211_sta_ps_transition_ni - PS transition for connected sta 2986 * (in process context) 2987 * 2988 * Like ieee80211_sta_ps_transition() but can be called in process context 2989 * (internally disables bottom halves). Concurrent call restriction still 2990 * applies. 2991 * 2992 * @sta: currently connected sta 2993 * @start: start or stop PS 2994 * 2995 * Return: Like ieee80211_sta_ps_transition(). 2996 */ 2997static inline int ieee80211_sta_ps_transition_ni(struct ieee80211_sta *sta, 2998 bool start) 2999{ 3000 int ret; 3001 3002 local_bh_disable(); 3003 ret = ieee80211_sta_ps_transition(sta, start); 3004 local_bh_enable(); 3005 3006 return ret; 3007} 3008 3009/* 3010 * The TX headroom reserved by mac80211 for its own tx_status functions. 3011 * This is enough for the radiotap header. 3012 */ 3013#define IEEE80211_TX_STATUS_HEADROOM 14 3014 3015/** 3016 * ieee80211_sta_set_buffered - inform mac80211 about driver-buffered frames 3017 * @sta: &struct ieee80211_sta pointer for the sleeping station 3018 * @tid: the TID that has buffered frames 3019 * @buffered: indicates whether or not frames are buffered for this TID 3020 * 3021 * If a driver buffers frames for a powersave station instead of passing 3022 * them back to mac80211 for retransmission, the station may still need 3023 * to be told that there are buffered frames via the TIM bit. 3024 * 3025 * This function informs mac80211 whether or not there are frames that are 3026 * buffered in the driver for a given TID; mac80211 can then use this data 3027 * to set the TIM bit (NOTE: This may call back into the driver's set_tim 3028 * call! Beware of the locking!) 3029 * 3030 * If all frames are released to the station (due to PS-poll or uAPSD) 3031 * then the driver needs to inform mac80211 that there no longer are 3032 * frames buffered. However, when the station wakes up mac80211 assumes 3033 * that all buffered frames will be transmitted and clears this data, 3034 * drivers need to make sure they inform mac80211 about all buffered 3035 * frames on the sleep transition (sta_notify() with %STA_NOTIFY_SLEEP). 3036 * 3037 * Note that technically mac80211 only needs to know this per AC, not per 3038 * TID, but since driver buffering will inevitably happen per TID (since 3039 * it is related to aggregation) it is easier to make mac80211 map the 3040 * TID to the AC as required instead of keeping track in all drivers that 3041 * use this API. 3042 */ 3043void ieee80211_sta_set_buffered(struct ieee80211_sta *sta, 3044 u8 tid, bool buffered); 3045 3046/** 3047 * ieee80211_tx_status - transmit status callback 3048 * 3049 * Call this function for all transmitted frames after they have been 3050 * transmitted. It is permissible to not call this function for 3051 * multicast frames but this can affect statistics. 3052 * 3053 * This function may not be called in IRQ context. Calls to this function 3054 * for a single hardware must be synchronized against each other. Calls 3055 * to this function, ieee80211_tx_status_ni() and ieee80211_tx_status_irqsafe() 3056 * may not be mixed for a single hardware. 3057 * 3058 * @hw: the hardware the frame was transmitted by 3059 * @skb: the frame that was transmitted, owned by mac80211 after this call 3060 */ 3061void ieee80211_tx_status(struct ieee80211_hw *hw, 3062 struct sk_buff *skb); 3063 3064/** 3065 * ieee80211_tx_status_ni - transmit status callback (in process context) 3066 * 3067 * Like ieee80211_tx_status() but can be called in process context. 3068 * 3069 * Calls to this function, ieee80211_tx_status() and 3070 * ieee80211_tx_status_irqsafe() may not be mixed 3071 * for a single hardware. 3072 * 3073 * @hw: the hardware the frame was transmitted by 3074 * @skb: the frame that was transmitted, owned by mac80211 after this call 3075 */ 3076static inline void ieee80211_tx_status_ni(struct ieee80211_hw *hw, 3077 struct sk_buff *skb) 3078{ 3079 local_bh_disable(); 3080 ieee80211_tx_status(hw, skb); 3081 local_bh_enable(); 3082} 3083 3084/** 3085 * ieee80211_tx_status_irqsafe - IRQ-safe transmit status callback 3086 * 3087 * Like ieee80211_tx_status() but can be called in IRQ context 3088 * (internally defers to a tasklet.) 3089 * 3090 * Calls to this function, ieee80211_tx_status() and 3091 * ieee80211_tx_status_ni() may not be mixed for a single hardware. 3092 * 3093 * @hw: the hardware the frame was transmitted by 3094 * @skb: the frame that was transmitted, owned by mac80211 after this call 3095 */ 3096void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw, 3097 struct sk_buff *skb); 3098 3099/** 3100 * ieee80211_report_low_ack - report non-responding station 3101 * 3102 * When operating in AP-mode, call this function to report a non-responding 3103 * connected STA. 3104 * 3105 * @sta: the non-responding connected sta 3106 * @num_packets: number of packets sent to @sta without a response 3107 */ 3108void ieee80211_report_low_ack(struct ieee80211_sta *sta, u32 num_packets); 3109 3110/** 3111 * ieee80211_beacon_get_tim - beacon generation function 3112 * @hw: pointer obtained from ieee80211_alloc_hw(). 3113 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3114 * @tim_offset: pointer to variable that will receive the TIM IE offset. 3115 * Set to 0 if invalid (in non-AP modes). 3116 * @tim_length: pointer to variable that will receive the TIM IE length, 3117 * (including the ID and length bytes!). 3118 * Set to 0 if invalid (in non-AP modes). 3119 * 3120 * If the driver implements beaconing modes, it must use this function to 3121 * obtain the beacon frame/template. 3122 * 3123 * If the beacon frames are generated by the host system (i.e., not in 3124 * hardware/firmware), the driver uses this function to get each beacon 3125 * frame from mac80211 -- it is responsible for calling this function 3126 * before the beacon is needed (e.g. based on hardware interrupt). 3127 * 3128 * If the beacon frames are generated by the device, then the driver 3129 * must use the returned beacon as the template and change the TIM IE 3130 * according to the current DTIM parameters/TIM bitmap. 3131 * 3132 * The driver is responsible for freeing the returned skb. 3133 * 3134 * Return: The beacon template. %NULL on error. 3135 */ 3136struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw, 3137 struct ieee80211_vif *vif, 3138 u16 *tim_offset, u16 *tim_length); 3139 3140/** 3141 * ieee80211_beacon_get - beacon generation function 3142 * @hw: pointer obtained from ieee80211_alloc_hw(). 3143 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3144 * 3145 * See ieee80211_beacon_get_tim(). 3146 * 3147 * Return: See ieee80211_beacon_get_tim(). 3148 */ 3149static inline struct sk_buff *ieee80211_beacon_get(struct ieee80211_hw *hw, 3150 struct ieee80211_vif *vif) 3151{ 3152 return ieee80211_beacon_get_tim(hw, vif, NULL, NULL); 3153} 3154 3155/** 3156 * ieee80211_proberesp_get - retrieve a Probe Response template 3157 * @hw: pointer obtained from ieee80211_alloc_hw(). 3158 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3159 * 3160 * Creates a Probe Response template which can, for example, be uploaded to 3161 * hardware. The destination address should be set by the caller. 3162 * 3163 * Can only be called in AP mode. 3164 * 3165 * Return: The Probe Response template. %NULL on error. 3166 */ 3167struct sk_buff *ieee80211_proberesp_get(struct ieee80211_hw *hw, 3168 struct ieee80211_vif *vif); 3169 3170/** 3171 * ieee80211_pspoll_get - retrieve a PS Poll template 3172 * @hw: pointer obtained from ieee80211_alloc_hw(). 3173 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3174 * 3175 * Creates a PS Poll a template which can, for example, uploaded to 3176 * hardware. The template must be updated after association so that correct 3177 * AID, BSSID and MAC address is used. 3178 * 3179 * Note: Caller (or hardware) is responsible for setting the 3180 * &IEEE80211_FCTL_PM bit. 3181 * 3182 * Return: The PS Poll template. %NULL on error. 3183 */ 3184struct sk_buff *ieee80211_pspoll_get(struct ieee80211_hw *hw, 3185 struct ieee80211_vif *vif); 3186 3187/** 3188 * ieee80211_nullfunc_get - retrieve a nullfunc template 3189 * @hw: pointer obtained from ieee80211_alloc_hw(). 3190 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3191 * 3192 * Creates a Nullfunc template which can, for example, uploaded to 3193 * hardware. The template must be updated after association so that correct 3194 * BSSID and address is used. 3195 * 3196 * Note: Caller (or hardware) is responsible for setting the 3197 * &IEEE80211_FCTL_PM bit as well as Duration and Sequence Control fields. 3198 * 3199 * Return: The nullfunc template. %NULL on error. 3200 */ 3201struct sk_buff *ieee80211_nullfunc_get(struct ieee80211_hw *hw, 3202 struct ieee80211_vif *vif); 3203 3204/** 3205 * ieee80211_probereq_get - retrieve a Probe Request template 3206 * @hw: pointer obtained from ieee80211_alloc_hw(). 3207 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3208 * @ssid: SSID buffer 3209 * @ssid_len: length of SSID 3210 * @tailroom: tailroom to reserve at end of SKB for IEs 3211 * 3212 * Creates a Probe Request template which can, for example, be uploaded to 3213 * hardware. 3214 * 3215 * Return: The Probe Request template. %NULL on error. 3216 */ 3217struct sk_buff *ieee80211_probereq_get(struct ieee80211_hw *hw, 3218 struct ieee80211_vif *vif, 3219 const u8 *ssid, size_t ssid_len, 3220 size_t tailroom); 3221 3222/** 3223 * ieee80211_rts_get - RTS frame generation function 3224 * @hw: pointer obtained from ieee80211_alloc_hw(). 3225 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3226 * @frame: pointer to the frame that is going to be protected by the RTS. 3227 * @frame_len: the frame length (in octets). 3228 * @frame_txctl: &struct ieee80211_tx_info of the frame. 3229 * @rts: The buffer where to store the RTS frame. 3230 * 3231 * If the RTS frames are generated by the host system (i.e., not in 3232 * hardware/firmware), the low-level driver uses this function to receive 3233 * the next RTS frame from the 802.11 code. The low-level is responsible 3234 * for calling this function before and RTS frame is needed. 3235 */ 3236void ieee80211_rts_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 3237 const void *frame, size_t frame_len, 3238 const struct ieee80211_tx_info *frame_txctl, 3239 struct ieee80211_rts *rts); 3240 3241/** 3242 * ieee80211_rts_duration - Get the duration field for an RTS frame 3243 * @hw: pointer obtained from ieee80211_alloc_hw(). 3244 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3245 * @frame_len: the length of the frame that is going to be protected by the RTS. 3246 * @frame_txctl: &struct ieee80211_tx_info of the frame. 3247 * 3248 * If the RTS is generated in firmware, but the host system must provide 3249 * the duration field, the low-level driver uses this function to receive 3250 * the duration field value in little-endian byteorder. 3251 * 3252 * Return: The duration. 3253 */ 3254__le16 ieee80211_rts_duration(struct ieee80211_hw *hw, 3255 struct ieee80211_vif *vif, size_t frame_len, 3256 const struct ieee80211_tx_info *frame_txctl); 3257 3258/** 3259 * ieee80211_ctstoself_get - CTS-to-self frame generation function 3260 * @hw: pointer obtained from ieee80211_alloc_hw(). 3261 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3262 * @frame: pointer to the frame that is going to be protected by the CTS-to-self. 3263 * @frame_len: the frame length (in octets). 3264 * @frame_txctl: &struct ieee80211_tx_info of the frame. 3265 * @cts: The buffer where to store the CTS-to-self frame. 3266 * 3267 * If the CTS-to-self frames are generated by the host system (i.e., not in 3268 * hardware/firmware), the low-level driver uses this function to receive 3269 * the next CTS-to-self frame from the 802.11 code. The low-level is responsible 3270 * for calling this function before and CTS-to-self frame is needed. 3271 */ 3272void ieee80211_ctstoself_get(struct ieee80211_hw *hw, 3273 struct ieee80211_vif *vif, 3274 const void *frame, size_t frame_len, 3275 const struct ieee80211_tx_info *frame_txctl, 3276 struct ieee80211_cts *cts); 3277 3278/** 3279 * ieee80211_ctstoself_duration - Get the duration field for a CTS-to-self frame 3280 * @hw: pointer obtained from ieee80211_alloc_hw(). 3281 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3282 * @frame_len: the length of the frame that is going to be protected by the CTS-to-self. 3283 * @frame_txctl: &struct ieee80211_tx_info of the frame. 3284 * 3285 * If the CTS-to-self is generated in firmware, but the host system must provide 3286 * the duration field, the low-level driver uses this function to receive 3287 * the duration field value in little-endian byteorder. 3288 * 3289 * Return: The duration. 3290 */ 3291__le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw, 3292 struct ieee80211_vif *vif, 3293 size_t frame_len, 3294 const struct ieee80211_tx_info *frame_txctl); 3295 3296/** 3297 * ieee80211_generic_frame_duration - Calculate the duration field for a frame 3298 * @hw: pointer obtained from ieee80211_alloc_hw(). 3299 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3300 * @band: the band to calculate the frame duration on 3301 * @frame_len: the length of the frame. 3302 * @rate: the rate at which the frame is going to be transmitted. 3303 * 3304 * Calculate the duration field of some generic frame, given its 3305 * length and transmission rate (in 100kbps). 3306 * 3307 * Return: The duration. 3308 */ 3309__le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw, 3310 struct ieee80211_vif *vif, 3311 enum ieee80211_band band, 3312 size_t frame_len, 3313 struct ieee80211_rate *rate); 3314 3315/** 3316 * ieee80211_get_buffered_bc - accessing buffered broadcast and multicast frames 3317 * @hw: pointer as obtained from ieee80211_alloc_hw(). 3318 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3319 * 3320 * Function for accessing buffered broadcast and multicast frames. If 3321 * hardware/firmware does not implement buffering of broadcast/multicast 3322 * frames when power saving is used, 802.11 code buffers them in the host 3323 * memory. The low-level driver uses this function to fetch next buffered 3324 * frame. In most cases, this is used when generating beacon frame. 3325 * 3326 * Return: A pointer to the next buffered skb or NULL if no more buffered 3327 * frames are available. 3328 * 3329 * Note: buffered frames are returned only after DTIM beacon frame was 3330 * generated with ieee80211_beacon_get() and the low-level driver must thus 3331 * call ieee80211_beacon_get() first. ieee80211_get_buffered_bc() returns 3332 * NULL if the previous generated beacon was not DTIM, so the low-level driver 3333 * does not need to check for DTIM beacons separately and should be able to 3334 * use common code for all beacons. 3335 */ 3336struct sk_buff * 3337ieee80211_get_buffered_bc(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 3338 3339/** 3340 * ieee80211_get_tkip_p1k_iv - get a TKIP phase 1 key for IV32 3341 * 3342 * This function returns the TKIP phase 1 key for the given IV32. 3343 * 3344 * @keyconf: the parameter passed with the set key 3345 * @iv32: IV32 to get the P1K for 3346 * @p1k: a buffer to which the key will be written, as 5 u16 values 3347 */ 3348void ieee80211_get_tkip_p1k_iv(struct ieee80211_key_conf *keyconf, 3349 u32 iv32, u16 *p1k); 3350 3351/** 3352 * ieee80211_get_tkip_p1k - get a TKIP phase 1 key 3353 * 3354 * This function returns the TKIP phase 1 key for the IV32 taken 3355 * from the given packet. 3356 * 3357 * @keyconf: the parameter passed with the set key 3358 * @skb: the packet to take the IV32 value from that will be encrypted 3359 * with this P1K 3360 * @p1k: a buffer to which the key will be written, as 5 u16 values 3361 */ 3362static inline void ieee80211_get_tkip_p1k(struct ieee80211_key_conf *keyconf, 3363 struct sk_buff *skb, u16 *p1k) 3364{ 3365 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 3366 const u8 *data = (u8 *)hdr + ieee80211_hdrlen(hdr->frame_control); 3367 u32 iv32 = get_unaligned_le32(&data[4]); 3368 3369 ieee80211_get_tkip_p1k_iv(keyconf, iv32, p1k); 3370} 3371 3372/** 3373 * ieee80211_get_tkip_rx_p1k - get a TKIP phase 1 key for RX 3374 * 3375 * This function returns the TKIP phase 1 key for the given IV32 3376 * and transmitter address. 3377 * 3378 * @keyconf: the parameter passed with the set key 3379 * @ta: TA that will be used with the key 3380 * @iv32: IV32 to get the P1K for 3381 * @p1k: a buffer to which the key will be written, as 5 u16 values 3382 */ 3383void ieee80211_get_tkip_rx_p1k(struct ieee80211_key_conf *keyconf, 3384 const u8 *ta, u32 iv32, u16 *p1k); 3385 3386/** 3387 * ieee80211_get_tkip_p2k - get a TKIP phase 2 key 3388 * 3389 * This function computes the TKIP RC4 key for the IV values 3390 * in the packet. 3391 * 3392 * @keyconf: the parameter passed with the set key 3393 * @skb: the packet to take the IV32/IV16 values from that will be 3394 * encrypted with this key 3395 * @p2k: a buffer to which the key will be written, 16 bytes 3396 */ 3397void ieee80211_get_tkip_p2k(struct ieee80211_key_conf *keyconf, 3398 struct sk_buff *skb, u8 *p2k); 3399 3400/** 3401 * ieee80211_aes_cmac_calculate_k1_k2 - calculate the AES-CMAC sub keys 3402 * 3403 * This function computes the two AES-CMAC sub-keys, based on the 3404 * previously installed master key. 3405 * 3406 * @keyconf: the parameter passed with the set key 3407 * @k1: a buffer to be filled with the 1st sub-key 3408 * @k2: a buffer to be filled with the 2nd sub-key 3409 */ 3410void ieee80211_aes_cmac_calculate_k1_k2(struct ieee80211_key_conf *keyconf, 3411 u8 *k1, u8 *k2); 3412 3413/** 3414 * struct ieee80211_key_seq - key sequence counter 3415 * 3416 * @tkip: TKIP data, containing IV32 and IV16 in host byte order 3417 * @ccmp: PN data, most significant byte first (big endian, 3418 * reverse order than in packet) 3419 * @aes_cmac: PN data, most significant byte first (big endian, 3420 * reverse order than in packet) 3421 */ 3422struct ieee80211_key_seq { 3423 union { 3424 struct { 3425 u32 iv32; 3426 u16 iv16; 3427 } tkip; 3428 struct { 3429 u8 pn[6]; 3430 } ccmp; 3431 struct { 3432 u8 pn[6]; 3433 } aes_cmac; 3434 }; 3435}; 3436 3437/** 3438 * ieee80211_get_key_tx_seq - get key TX sequence counter 3439 * 3440 * @keyconf: the parameter passed with the set key 3441 * @seq: buffer to receive the sequence data 3442 * 3443 * This function allows a driver to retrieve the current TX IV/PN 3444 * for the given key. It must not be called if IV generation is 3445 * offloaded to the device. 3446 * 3447 * Note that this function may only be called when no TX processing 3448 * can be done concurrently, for example when queues are stopped 3449 * and the stop has been synchronized. 3450 */ 3451void ieee80211_get_key_tx_seq(struct ieee80211_key_conf *keyconf, 3452 struct ieee80211_key_seq *seq); 3453 3454/** 3455 * ieee80211_get_key_rx_seq - get key RX sequence counter 3456 * 3457 * @keyconf: the parameter passed with the set key 3458 * @tid: The TID, or -1 for the management frame value (CCMP only); 3459 * the value on TID 0 is also used for non-QoS frames. For 3460 * CMAC, only TID 0 is valid. 3461 * @seq: buffer to receive the sequence data 3462 * 3463 * This function allows a driver to retrieve the current RX IV/PNs 3464 * for the given key. It must not be called if IV checking is done 3465 * by the device and not by mac80211. 3466 * 3467 * Note that this function may only be called when no RX processing 3468 * can be done concurrently. 3469 */ 3470void ieee80211_get_key_rx_seq(struct ieee80211_key_conf *keyconf, 3471 int tid, struct ieee80211_key_seq *seq); 3472 3473/** 3474 * ieee80211_gtk_rekey_notify - notify userspace supplicant of rekeying 3475 * @vif: virtual interface the rekeying was done on 3476 * @bssid: The BSSID of the AP, for checking association 3477 * @replay_ctr: the new replay counter after GTK rekeying 3478 * @gfp: allocation flags 3479 */ 3480void ieee80211_gtk_rekey_notify(struct ieee80211_vif *vif, const u8 *bssid, 3481 const u8 *replay_ctr, gfp_t gfp); 3482 3483/** 3484 * ieee80211_wake_queue - wake specific queue 3485 * @hw: pointer as obtained from ieee80211_alloc_hw(). 3486 * @queue: queue number (counted from zero). 3487 * 3488 * Drivers should use this function instead of netif_wake_queue. 3489 */ 3490void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue); 3491 3492/** 3493 * ieee80211_stop_queue - stop specific queue 3494 * @hw: pointer as obtained from ieee80211_alloc_hw(). 3495 * @queue: queue number (counted from zero). 3496 * 3497 * Drivers should use this function instead of netif_stop_queue. 3498 */ 3499void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue); 3500 3501/** 3502 * ieee80211_queue_stopped - test status of the queue 3503 * @hw: pointer as obtained from ieee80211_alloc_hw(). 3504 * @queue: queue number (counted from zero). 3505 * 3506 * Drivers should use this function instead of netif_stop_queue. 3507 * 3508 * Return: %true if the queue is stopped. %false otherwise. 3509 */ 3510 3511int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue); 3512 3513/** 3514 * ieee80211_stop_queues - stop all queues 3515 * @hw: pointer as obtained from ieee80211_alloc_hw(). 3516 * 3517 * Drivers should use this function instead of netif_stop_queue. 3518 */ 3519void ieee80211_stop_queues(struct ieee80211_hw *hw); 3520 3521/** 3522 * ieee80211_wake_queues - wake all queues 3523 * @hw: pointer as obtained from ieee80211_alloc_hw(). 3524 * 3525 * Drivers should use this function instead of netif_wake_queue. 3526 */ 3527void ieee80211_wake_queues(struct ieee80211_hw *hw); 3528 3529/** 3530 * ieee80211_scan_completed - completed hardware scan 3531 * 3532 * When hardware scan offload is used (i.e. the hw_scan() callback is 3533 * assigned) this function needs to be called by the driver to notify 3534 * mac80211 that the scan finished. This function can be called from 3535 * any context, including hardirq context. 3536 * 3537 * @hw: the hardware that finished the scan 3538 * @aborted: set to true if scan was aborted 3539 */ 3540void ieee80211_scan_completed(struct ieee80211_hw *hw, bool aborted); 3541 3542/** 3543 * ieee80211_sched_scan_results - got results from scheduled scan 3544 * 3545 * When a scheduled scan is running, this function needs to be called by the 3546 * driver whenever there are new scan results available. 3547 * 3548 * @hw: the hardware that is performing scheduled scans 3549 */ 3550void ieee80211_sched_scan_results(struct ieee80211_hw *hw); 3551 3552/** 3553 * ieee80211_sched_scan_stopped - inform that the scheduled scan has stopped 3554 * 3555 * When a scheduled scan is running, this function can be called by 3556 * the driver if it needs to stop the scan to perform another task. 3557 * Usual scenarios are drivers that cannot continue the scheduled scan 3558 * while associating, for instance. 3559 * 3560 * @hw: the hardware that is performing scheduled scans 3561 */ 3562void ieee80211_sched_scan_stopped(struct ieee80211_hw *hw); 3563 3564/** 3565 * enum ieee80211_interface_iteration_flags - interface iteration flags 3566 * @IEEE80211_IFACE_ITER_NORMAL: Iterate over all interfaces that have 3567 * been added to the driver; However, note that during hardware 3568 * reconfiguration (after restart_hw) it will iterate over a new 3569 * interface and over all the existing interfaces even if they 3570 * haven't been re-added to the driver yet. 3571 * @IEEE80211_IFACE_ITER_RESUME_ALL: During resume, iterate over all 3572 * interfaces, even if they haven't been re-added to the driver yet. 3573 */ 3574enum ieee80211_interface_iteration_flags { 3575 IEEE80211_IFACE_ITER_NORMAL = 0, 3576 IEEE80211_IFACE_ITER_RESUME_ALL = BIT(0), 3577}; 3578 3579/** 3580 * ieee80211_iterate_active_interfaces - iterate active interfaces 3581 * 3582 * This function iterates over the interfaces associated with a given 3583 * hardware that are currently active and calls the callback for them. 3584 * This function allows the iterator function to sleep, when the iterator 3585 * function is atomic @ieee80211_iterate_active_interfaces_atomic can 3586 * be used. 3587 * Does not iterate over a new interface during add_interface(). 3588 * 3589 * @hw: the hardware struct of which the interfaces should be iterated over 3590 * @iter_flags: iteration flags, see &enum ieee80211_interface_iteration_flags 3591 * @iterator: the iterator function to call 3592 * @data: first argument of the iterator function 3593 */ 3594void ieee80211_iterate_active_interfaces(struct ieee80211_hw *hw, 3595 u32 iter_flags, 3596 void (*iterator)(void *data, u8 *mac, 3597 struct ieee80211_vif *vif), 3598 void *data); 3599 3600/** 3601 * ieee80211_iterate_active_interfaces_atomic - iterate active interfaces 3602 * 3603 * This function iterates over the interfaces associated with a given 3604 * hardware that are currently active and calls the callback for them. 3605 * This function requires the iterator callback function to be atomic, 3606 * if that is not desired, use @ieee80211_iterate_active_interfaces instead. 3607 * Does not iterate over a new interface during add_interface(). 3608 * 3609 * @hw: the hardware struct of which the interfaces should be iterated over 3610 * @iter_flags: iteration flags, see &enum ieee80211_interface_iteration_flags 3611 * @iterator: the iterator function to call, cannot sleep 3612 * @data: first argument of the iterator function 3613 */ 3614void ieee80211_iterate_active_interfaces_atomic(struct ieee80211_hw *hw, 3615 u32 iter_flags, 3616 void (*iterator)(void *data, 3617 u8 *mac, 3618 struct ieee80211_vif *vif), 3619 void *data); 3620 3621/** 3622 * ieee80211_queue_work - add work onto the mac80211 workqueue 3623 * 3624 * Drivers and mac80211 use this to add work onto the mac80211 workqueue. 3625 * This helper ensures drivers are not queueing work when they should not be. 3626 * 3627 * @hw: the hardware struct for the interface we are adding work for 3628 * @work: the work we want to add onto the mac80211 workqueue 3629 */ 3630void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work); 3631 3632/** 3633 * ieee80211_queue_delayed_work - add work onto the mac80211 workqueue 3634 * 3635 * Drivers and mac80211 use this to queue delayed work onto the mac80211 3636 * workqueue. 3637 * 3638 * @hw: the hardware struct for the interface we are adding work for 3639 * @dwork: delayable work to queue onto the mac80211 workqueue 3640 * @delay: number of jiffies to wait before queueing 3641 */ 3642void ieee80211_queue_delayed_work(struct ieee80211_hw *hw, 3643 struct delayed_work *dwork, 3644 unsigned long delay); 3645 3646/** 3647 * ieee80211_start_tx_ba_session - Start a tx Block Ack session. 3648 * @sta: the station for which to start a BA session 3649 * @tid: the TID to BA on. 3650 * @timeout: session timeout value (in TUs) 3651 * 3652 * Return: success if addBA request was sent, failure otherwise 3653 * 3654 * Although mac80211/low level driver/user space application can estimate 3655 * the need to start aggregation on a certain RA/TID, the session level 3656 * will be managed by the mac80211. 3657 */ 3658int ieee80211_start_tx_ba_session(struct ieee80211_sta *sta, u16 tid, 3659 u16 timeout); 3660 3661/** 3662 * ieee80211_start_tx_ba_cb_irqsafe - low level driver ready to aggregate. 3663 * @vif: &struct ieee80211_vif pointer from the add_interface callback 3664 * @ra: receiver address of the BA session recipient. 3665 * @tid: the TID to BA on. 3666 * 3667 * This function must be called by low level driver once it has 3668 * finished with preparations for the BA session. It can be called 3669 * from any context. 3670 */ 3671void ieee80211_start_tx_ba_cb_irqsafe(struct ieee80211_vif *vif, const u8 *ra, 3672 u16 tid); 3673 3674/** 3675 * ieee80211_stop_tx_ba_session - Stop a Block Ack session. 3676 * @sta: the station whose BA session to stop 3677 * @tid: the TID to stop BA. 3678 * 3679 * Return: negative error if the TID is invalid, or no aggregation active 3680 * 3681 * Although mac80211/low level driver/user space application can estimate 3682 * the need to stop aggregation on a certain RA/TID, the session level 3683 * will be managed by the mac80211. 3684 */ 3685int ieee80211_stop_tx_ba_session(struct ieee80211_sta *sta, u16 tid); 3686 3687/** 3688 * ieee80211_stop_tx_ba_cb_irqsafe - low level driver ready to stop aggregate. 3689 * @vif: &struct ieee80211_vif pointer from the add_interface callback 3690 * @ra: receiver address of the BA session recipient. 3691 * @tid: the desired TID to BA on. 3692 * 3693 * This function must be called by low level driver once it has 3694 * finished with preparations for the BA session tear down. It 3695 * can be called from any context. 3696 */ 3697void ieee80211_stop_tx_ba_cb_irqsafe(struct ieee80211_vif *vif, const u8 *ra, 3698 u16 tid); 3699 3700/** 3701 * ieee80211_find_sta - find a station 3702 * 3703 * @vif: virtual interface to look for station on 3704 * @addr: station's address 3705 * 3706 * Return: The station, if found. %NULL otherwise. 3707 * 3708 * Note: This function must be called under RCU lock and the 3709 * resulting pointer is only valid under RCU lock as well. 3710 */ 3711struct ieee80211_sta *ieee80211_find_sta(struct ieee80211_vif *vif, 3712 const u8 *addr); 3713 3714/** 3715 * ieee80211_find_sta_by_ifaddr - find a station on hardware 3716 * 3717 * @hw: pointer as obtained from ieee80211_alloc_hw() 3718 * @addr: remote station's address 3719 * @localaddr: local address (vif->sdata->vif.addr). Use NULL for 'any'. 3720 * 3721 * Return: The station, if found. %NULL otherwise. 3722 * 3723 * Note: This function must be called under RCU lock and the 3724 * resulting pointer is only valid under RCU lock as well. 3725 * 3726 * NOTE: You may pass NULL for localaddr, but then you will just get 3727 * the first STA that matches the remote address 'addr'. 3728 * We can have multiple STA associated with multiple 3729 * logical stations (e.g. consider a station connecting to another 3730 * BSSID on the same AP hardware without disconnecting first). 3731 * In this case, the result of this method with localaddr NULL 3732 * is not reliable. 3733 * 3734 * DO NOT USE THIS FUNCTION with localaddr NULL if at all possible. 3735 */ 3736struct ieee80211_sta *ieee80211_find_sta_by_ifaddr(struct ieee80211_hw *hw, 3737 const u8 *addr, 3738 const u8 *localaddr); 3739 3740/** 3741 * ieee80211_sta_block_awake - block station from waking up 3742 * @hw: the hardware 3743 * @pubsta: the station 3744 * @block: whether to block or unblock 3745 * 3746 * Some devices require that all frames that are on the queues 3747 * for a specific station that went to sleep are flushed before 3748 * a poll response or frames after the station woke up can be 3749 * delivered to that it. Note that such frames must be rejected 3750 * by the driver as filtered, with the appropriate status flag. 3751 * 3752 * This function allows implementing this mode in a race-free 3753 * manner. 3754 * 3755 * To do this, a driver must keep track of the number of frames 3756 * still enqueued for a specific station. If this number is not 3757 * zero when the station goes to sleep, the driver must call 3758 * this function to force mac80211 to consider the station to 3759 * be asleep regardless of the station's actual state. Once the 3760 * number of outstanding frames reaches zero, the driver must 3761 * call this function again to unblock the station. That will 3762 * cause mac80211 to be able to send ps-poll responses, and if 3763 * the station queried in the meantime then frames will also 3764 * be sent out as a result of this. Additionally, the driver 3765 * will be notified that the station woke up some time after 3766 * it is unblocked, regardless of whether the station actually 3767 * woke up while blocked or not. 3768 */ 3769void ieee80211_sta_block_awake(struct ieee80211_hw *hw, 3770 struct ieee80211_sta *pubsta, bool block); 3771 3772/** 3773 * ieee80211_sta_eosp - notify mac80211 about end of SP 3774 * @pubsta: the station 3775 * 3776 * When a device transmits frames in a way that it can't tell 3777 * mac80211 in the TX status about the EOSP, it must clear the 3778 * %IEEE80211_TX_STATUS_EOSP bit and call this function instead. 3779 * This applies for PS-Poll as well as uAPSD. 3780 * 3781 * Note that there is no non-_irqsafe version right now as 3782 * it wasn't needed, but just like _tx_status() and _rx() 3783 * must not be mixed in irqsafe/non-irqsafe versions, this 3784 * function must not be mixed with those either. Use the 3785 * all irqsafe, or all non-irqsafe, don't mix! If you need 3786 * the non-irqsafe version of this, you need to add it. 3787 */ 3788void ieee80211_sta_eosp_irqsafe(struct ieee80211_sta *pubsta); 3789 3790/** 3791 * ieee80211_iter_keys - iterate keys programmed into the device 3792 * @hw: pointer obtained from ieee80211_alloc_hw() 3793 * @vif: virtual interface to iterate, may be %NULL for all 3794 * @iter: iterator function that will be called for each key 3795 * @iter_data: custom data to pass to the iterator function 3796 * 3797 * This function can be used to iterate all the keys known to 3798 * mac80211, even those that weren't previously programmed into 3799 * the device. This is intended for use in WoWLAN if the device 3800 * needs reprogramming of the keys during suspend. Note that due 3801 * to locking reasons, it is also only safe to call this at few 3802 * spots since it must hold the RTNL and be able to sleep. 3803 * 3804 * The order in which the keys are iterated matches the order 3805 * in which they were originally installed and handed to the 3806 * set_key callback. 3807 */ 3808void ieee80211_iter_keys(struct ieee80211_hw *hw, 3809 struct ieee80211_vif *vif, 3810 void (*iter)(struct ieee80211_hw *hw, 3811 struct ieee80211_vif *vif, 3812 struct ieee80211_sta *sta, 3813 struct ieee80211_key_conf *key, 3814 void *data), 3815 void *iter_data); 3816 3817/** 3818 * ieee80211_iter_chan_contexts_atomic - iterate channel contexts 3819 * @hw: pointre obtained from ieee80211_alloc_hw(). 3820 * @iter: iterator function 3821 * @iter_data: data passed to iterator function 3822 * 3823 * Iterate all active channel contexts. This function is atomic and 3824 * doesn't acquire any locks internally that might be held in other 3825 * places while calling into the driver. 3826 * 3827 * The iterator will not find a context that's being added (during 3828 * the driver callback to add it) but will find it while it's being 3829 * removed. 3830 * 3831 * Note that during hardware restart, all contexts that existed 3832 * before the restart are considered already present so will be 3833 * found while iterating, whether they've been re-added already 3834 * or not. 3835 */ 3836void ieee80211_iter_chan_contexts_atomic( 3837 struct ieee80211_hw *hw, 3838 void (*iter)(struct ieee80211_hw *hw, 3839 struct ieee80211_chanctx_conf *chanctx_conf, 3840 void *data), 3841 void *iter_data); 3842 3843/** 3844 * ieee80211_ap_probereq_get - retrieve a Probe Request template 3845 * @hw: pointer obtained from ieee80211_alloc_hw(). 3846 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3847 * 3848 * Creates a Probe Request template which can, for example, be uploaded to 3849 * hardware. The template is filled with bssid, ssid and supported rate 3850 * information. This function must only be called from within the 3851 * .bss_info_changed callback function and only in managed mode. The function 3852 * is only useful when the interface is associated, otherwise it will return 3853 * %NULL. 3854 * 3855 * Return: The Probe Request template. %NULL on error. 3856 */ 3857struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw, 3858 struct ieee80211_vif *vif); 3859 3860/** 3861 * ieee80211_beacon_loss - inform hardware does not receive beacons 3862 * 3863 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3864 * 3865 * When beacon filtering is enabled with %IEEE80211_VIF_BEACON_FILTER and 3866 * %IEEE80211_CONF_PS is set, the driver needs to inform whenever the 3867 * hardware is not receiving beacons with this function. 3868 */ 3869void ieee80211_beacon_loss(struct ieee80211_vif *vif); 3870 3871/** 3872 * ieee80211_connection_loss - inform hardware has lost connection to the AP 3873 * 3874 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3875 * 3876 * When beacon filtering is enabled with %IEEE80211_VIF_BEACON_FILTER, and 3877 * %IEEE80211_CONF_PS and %IEEE80211_HW_CONNECTION_MONITOR are set, the driver 3878 * needs to inform if the connection to the AP has been lost. 3879 * 3880 * This function will cause immediate change to disassociated state, 3881 * without connection recovery attempts. 3882 */ 3883void ieee80211_connection_loss(struct ieee80211_vif *vif); 3884 3885/** 3886 * ieee80211_resume_disconnect - disconnect from AP after resume 3887 * 3888 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3889 * 3890 * Instructs mac80211 to disconnect from the AP after resume. 3891 * Drivers can use this after WoWLAN if they know that the 3892 * connection cannot be kept up, for example because keys were 3893 * used while the device was asleep but the replay counters or 3894 * similar cannot be retrieved from the device during resume. 3895 * 3896 * Note that due to implementation issues, if the driver uses 3897 * the reconfiguration functionality during resume the interface 3898 * will still be added as associated first during resume and then 3899 * disconnect normally later. 3900 * 3901 * This function can only be called from the resume callback and 3902 * the driver must not be holding any of its own locks while it 3903 * calls this function, or at least not any locks it needs in the 3904 * key configuration paths (if it supports HW crypto). 3905 */ 3906void ieee80211_resume_disconnect(struct ieee80211_vif *vif); 3907 3908/** 3909 * ieee80211_disable_dyn_ps - force mac80211 to temporarily disable dynamic psm 3910 * 3911 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3912 * 3913 * Some hardware require full power save to manage simultaneous BT traffic 3914 * on the WLAN frequency. Full PSM is required periodically, whenever there are 3915 * burst of BT traffic. The hardware gets information of BT traffic via 3916 * hardware co-existence lines, and consequentially requests mac80211 to 3917 * (temporarily) enter full psm. 3918 * This function will only temporarily disable dynamic PS, not enable PSM if 3919 * it was not already enabled. 3920 * The driver must make sure to re-enable dynamic PS using 3921 * ieee80211_enable_dyn_ps() if the driver has disabled it. 3922 * 3923 */ 3924void ieee80211_disable_dyn_ps(struct ieee80211_vif *vif); 3925 3926/** 3927 * ieee80211_enable_dyn_ps - restore dynamic psm after being disabled 3928 * 3929 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3930 * 3931 * This function restores dynamic PS after being temporarily disabled via 3932 * ieee80211_disable_dyn_ps(). Each ieee80211_disable_dyn_ps() call must 3933 * be coupled with an eventual call to this function. 3934 * 3935 */ 3936void ieee80211_enable_dyn_ps(struct ieee80211_vif *vif); 3937 3938/** 3939 * ieee80211_cqm_rssi_notify - inform a configured connection quality monitoring 3940 * rssi threshold triggered 3941 * 3942 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3943 * @rssi_event: the RSSI trigger event type 3944 * @gfp: context flags 3945 * 3946 * When the %IEEE80211_VIF_SUPPORTS_CQM_RSSI is set, and a connection quality 3947 * monitoring is configured with an rssi threshold, the driver will inform 3948 * whenever the rssi level reaches the threshold. 3949 */ 3950void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, 3951 enum nl80211_cqm_rssi_threshold_event rssi_event, 3952 gfp_t gfp); 3953 3954/** 3955 * ieee80211_chswitch_done - Complete channel switch process 3956 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3957 * @success: make the channel switch successful or not 3958 * 3959 * Complete the channel switch post-process: set the new operational channel 3960 * and wake up the suspended queues. 3961 */ 3962void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success); 3963 3964/** 3965 * ieee80211_request_smps - request SM PS transition 3966 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3967 * @smps_mode: new SM PS mode 3968 * 3969 * This allows the driver to request an SM PS transition in managed 3970 * mode. This is useful when the driver has more information than 3971 * the stack about possible interference, for example by bluetooth. 3972 */ 3973void ieee80211_request_smps(struct ieee80211_vif *vif, 3974 enum ieee80211_smps_mode smps_mode); 3975 3976/** 3977 * ieee80211_ready_on_channel - notification of remain-on-channel start 3978 * @hw: pointer as obtained from ieee80211_alloc_hw() 3979 */ 3980void ieee80211_ready_on_channel(struct ieee80211_hw *hw); 3981 3982/** 3983 * ieee80211_remain_on_channel_expired - remain_on_channel duration expired 3984 * @hw: pointer as obtained from ieee80211_alloc_hw() 3985 */ 3986void ieee80211_remain_on_channel_expired(struct ieee80211_hw *hw); 3987 3988/** 3989 * ieee80211_stop_rx_ba_session - callback to stop existing BA sessions 3990 * 3991 * in order not to harm the system performance and user experience, the device 3992 * may request not to allow any rx ba session and tear down existing rx ba 3993 * sessions based on system constraints such as periodic BT activity that needs 3994 * to limit wlan activity (eg.sco or a2dp)." 3995 * in such cases, the intention is to limit the duration of the rx ppdu and 3996 * therefore prevent the peer device to use a-mpdu aggregation. 3997 * 3998 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3999 * @ba_rx_bitmap: Bit map of open rx ba per tid 4000 * @addr: & to bssid mac address 4001 */ 4002void ieee80211_stop_rx_ba_session(struct ieee80211_vif *vif, u16 ba_rx_bitmap, 4003 const u8 *addr); 4004 4005/** 4006 * ieee80211_send_bar - send a BlockAckReq frame 4007 * 4008 * can be used to flush pending frames from the peer's aggregation reorder 4009 * buffer. 4010 * 4011 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4012 * @ra: the peer's destination address 4013 * @tid: the TID of the aggregation session 4014 * @ssn: the new starting sequence number for the receiver 4015 */ 4016void ieee80211_send_bar(struct ieee80211_vif *vif, u8 *ra, u16 tid, u16 ssn); 4017 4018/* Rate control API */ 4019 4020/** 4021 * struct ieee80211_tx_rate_control - rate control information for/from RC algo 4022 * 4023 * @hw: The hardware the algorithm is invoked for. 4024 * @sband: The band this frame is being transmitted on. 4025 * @bss_conf: the current BSS configuration 4026 * @skb: the skb that will be transmitted, the control information in it needs 4027 * to be filled in 4028 * @reported_rate: The rate control algorithm can fill this in to indicate 4029 * which rate should be reported to userspace as the current rate and 4030 * used for rate calculations in the mesh network. 4031 * @rts: whether RTS will be used for this frame because it is longer than the 4032 * RTS threshold 4033 * @short_preamble: whether mac80211 will request short-preamble transmission 4034 * if the selected rate supports it 4035 * @max_rate_idx: user-requested maximum (legacy) rate 4036 * (deprecated; this will be removed once drivers get updated to use 4037 * rate_idx_mask) 4038 * @rate_idx_mask: user-requested (legacy) rate mask 4039 * @rate_idx_mcs_mask: user-requested MCS rate mask 4040 * @bss: whether this frame is sent out in AP or IBSS mode 4041 */ 4042struct ieee80211_tx_rate_control { 4043 struct ieee80211_hw *hw; 4044 struct ieee80211_supported_band *sband; 4045 struct ieee80211_bss_conf *bss_conf; 4046 struct sk_buff *skb; 4047 struct ieee80211_tx_rate reported_rate; 4048 bool rts, short_preamble; 4049 u8 max_rate_idx; 4050 u32 rate_idx_mask; 4051 u8 rate_idx_mcs_mask[IEEE80211_HT_MCS_MASK_LEN]; 4052 bool bss; 4053}; 4054 4055struct rate_control_ops { 4056 struct module *module; 4057 const char *name; 4058 void *(*alloc)(struct ieee80211_hw *hw, struct dentry *debugfsdir); 4059 void (*free)(void *priv); 4060 4061 void *(*alloc_sta)(void *priv, struct ieee80211_sta *sta, gfp_t gfp); 4062 void (*rate_init)(void *priv, struct ieee80211_supported_band *sband, 4063 struct ieee80211_sta *sta, void *priv_sta); 4064 void (*rate_update)(void *priv, struct ieee80211_supported_band *sband, 4065 struct ieee80211_sta *sta, void *priv_sta, 4066 u32 changed); 4067 void (*free_sta)(void *priv, struct ieee80211_sta *sta, 4068 void *priv_sta); 4069 4070 void (*tx_status)(void *priv, struct ieee80211_supported_band *sband, 4071 struct ieee80211_sta *sta, void *priv_sta, 4072 struct sk_buff *skb); 4073 void (*get_rate)(void *priv, struct ieee80211_sta *sta, void *priv_sta, 4074 struct ieee80211_tx_rate_control *txrc); 4075 4076 void (*add_sta_debugfs)(void *priv, void *priv_sta, 4077 struct dentry *dir); 4078 void (*remove_sta_debugfs)(void *priv, void *priv_sta); 4079}; 4080 4081static inline int rate_supported(struct ieee80211_sta *sta, 4082 enum ieee80211_band band, 4083 int index) 4084{ 4085 return (sta == NULL || sta->supp_rates[band] & BIT(index)); 4086} 4087 4088/** 4089 * rate_control_send_low - helper for drivers for management/no-ack frames 4090 * 4091 * Rate control algorithms that agree to use the lowest rate to 4092 * send management frames and NO_ACK data with the respective hw 4093 * retries should use this in the beginning of their mac80211 get_rate 4094 * callback. If true is returned the rate control can simply return. 4095 * If false is returned we guarantee that sta and sta and priv_sta is 4096 * not null. 4097 * 4098 * Rate control algorithms wishing to do more intelligent selection of 4099 * rate for multicast/broadcast frames may choose to not use this. 4100 * 4101 * @sta: &struct ieee80211_sta pointer to the target destination. Note 4102 * that this may be null. 4103 * @priv_sta: private rate control structure. This may be null. 4104 * @txrc: rate control information we sholud populate for mac80211. 4105 */ 4106bool rate_control_send_low(struct ieee80211_sta *sta, 4107 void *priv_sta, 4108 struct ieee80211_tx_rate_control *txrc); 4109 4110 4111static inline s8 4112rate_lowest_index(struct ieee80211_supported_band *sband, 4113 struct ieee80211_sta *sta) 4114{ 4115 int i; 4116 4117 for (i = 0; i < sband->n_bitrates; i++) 4118 if (rate_supported(sta, sband->band, i)) 4119 return i; 4120 4121 /* warn when we cannot find a rate. */ 4122 WARN_ON_ONCE(1); 4123 4124 /* and return 0 (the lowest index) */ 4125 return 0; 4126} 4127 4128static inline 4129bool rate_usable_index_exists(struct ieee80211_supported_band *sband, 4130 struct ieee80211_sta *sta) 4131{ 4132 unsigned int i; 4133 4134 for (i = 0; i < sband->n_bitrates; i++) 4135 if (rate_supported(sta, sband->band, i)) 4136 return true; 4137 return false; 4138} 4139 4140int ieee80211_rate_control_register(struct rate_control_ops *ops); 4141void ieee80211_rate_control_unregister(struct rate_control_ops *ops); 4142 4143static inline bool 4144conf_is_ht20(struct ieee80211_conf *conf) 4145{ 4146 return conf->channel_type == NL80211_CHAN_HT20; 4147} 4148 4149static inline bool 4150conf_is_ht40_minus(struct ieee80211_conf *conf) 4151{ 4152 return conf->channel_type == NL80211_CHAN_HT40MINUS; 4153} 4154 4155static inline bool 4156conf_is_ht40_plus(struct ieee80211_conf *conf) 4157{ 4158 return conf->channel_type == NL80211_CHAN_HT40PLUS; 4159} 4160 4161static inline bool 4162conf_is_ht40(struct ieee80211_conf *conf) 4163{ 4164 return conf_is_ht40_minus(conf) || conf_is_ht40_plus(conf); 4165} 4166 4167static inline bool 4168conf_is_ht(struct ieee80211_conf *conf) 4169{ 4170 return conf->channel_type != NL80211_CHAN_NO_HT; 4171} 4172 4173static inline enum nl80211_iftype 4174ieee80211_iftype_p2p(enum nl80211_iftype type, bool p2p) 4175{ 4176 if (p2p) { 4177 switch (type) { 4178 case NL80211_IFTYPE_STATION: 4179 return NL80211_IFTYPE_P2P_CLIENT; 4180 case NL80211_IFTYPE_AP: 4181 return NL80211_IFTYPE_P2P_GO; 4182 default: 4183 break; 4184 } 4185 } 4186 return type; 4187} 4188 4189static inline enum nl80211_iftype 4190ieee80211_vif_type_p2p(struct ieee80211_vif *vif) 4191{ 4192 return ieee80211_iftype_p2p(vif->type, vif->p2p); 4193} 4194 4195void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif, 4196 int rssi_min_thold, 4197 int rssi_max_thold); 4198 4199void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif); 4200 4201/** 4202 * ieee80211_ave_rssi - report the average RSSI for the specified interface 4203 * 4204 * @vif: the specified virtual interface 4205 * 4206 * Note: This function assumes that the given vif is valid. 4207 * 4208 * Return: The average RSSI value for the requested interface, or 0 if not 4209 * applicable. 4210 */ 4211int ieee80211_ave_rssi(struct ieee80211_vif *vif); 4212 4213#endif /* MAC80211_H */ 4214